NVIDIA Accelerated Linux Driver Set README & Installation Guide Last Updated: $Date: 2004/01/07 $ Most Recent Driver: 1.0-5336 The NVIDIA Accelerated Linux Driver Set brings both accelerated 2D functionality and high performance OpenGL support to Linux x86 with the use of NVIDIA graphics processing units (GPUs). These drivers provide optimized hardware acceleration of OpenGL applications via a direct-rendering X Server and support nearly all NVIDIA graphics chips (please see APPENDIX A for a complete list of supported chips). TwinView, TV-Out and flat panel displays are also supported. This README describes how to install, configure, and use the NVIDIA Accelerated Linux Driver Set. This file is posted on NVIDIA's web site (www.nvidia.com), and is installed in /usr/share/doc/NVIDIA_GLX-1.0/. __________________________________________________________________________ CONTENTS: (sec-01) CHOOSING THE NVIDIA PACKAGES APPROPRIATE FOR YOUR SYSTEM (sec-02) INSTALLING THE NVIDIA DRIVER (sec-03) EDITING YOUR XF86CONFIG FILE (sec-04) FREQUENTLY ASKED QUESTIONS (sec-05) CONTACTING US (sec-06) FURTHER RESOURCES (app-a) APPENDIX A: SUPPORTED NVIDIA GRAPHICS CHIPS (app-b) APPENDIX B: MINIMUM SOFTWARE REQUIREMENTS (app-c) APPENDIX C: INSTALLED COMPONENTS (app-d) APPENDIX D: XF86CONFIG OPTIONS (app-e) APPENDIX E: OPENGL ENVIRONMENT VARIABLE SETTINGS (app-f) APPENDIX F: CONFIGURING AGP (app-g) APPENDIX G: ALI SPECIFIC ISSUES (app-h) APPENDIX H: TNT SPECIFIC ISSUES (app-i) APPENDIX I: CONFIGURING TWINVIEW (app-j) APPENDIX J: CONFIGURING TV-OUT (app-k) APPENDIX K: CONFIGURING A LAPTOP (app-l) APPENDIX L: PROGRAMMING MODES (app-m) APPENDIX M: FLIPPING AND UBB (app-n) APPENDIX N: KNOWN ISSUES (app-o) APPENDIX O: PROC INTERFACE (app-p) APPENDIX P: XVMC SUPPORT (app-q) APPENDIX Q: GLX SUPPORT (app-r) APPENDIX R: CONFIGURING MULTIPLE X SCREENS ON ONE CARD (app-s) APPENDIX S: POWER MANAGEMENT SUPPORT Please note that, in order to keep the instructions more concise, most caveats and frequently encountered problems are not detailed in the installation instructions, but rather in the FREQUENTLY ASKED QUESTIONS section. Therefore, it is recommended that you read this entire README before proceeding to perform any of the steps described. __________________________________________________________________________ (sec-01) CHOOSING THE NVIDIA PACKAGES APPROPRIATE FOR YOUR SYSTEM __________________________________________________________________________ NVIDIA has a unified driver architecture model; this means that one driver set can be used with all supported NVIDIA graphics chips. Please see Appendix A for a list of the NVIDIA graphics chips supported by the current drivers. Driver release 1.0-4349 introduced a new packaging and installation mechanism, which greatly simplifies the installation process. There is only a single file to download: NVIDIA-Linux-x86-1.0-1.0-5336-pkg1.run. This contains everything previously contained by the old NVIDIA_kernel and NVIDIA_GLX packages. Driver release 1.0-5336 introduces a package suffix ("-pkg#") to the .run file. This is used to distinguish between packages containing the same driver, but with different precompiled kernel interfaces. If there is any confusion, just download the .run file with the largest pkg number. __________________________________________________________________________ (sec-02) INSTALLING THE NVIDIA DRIVER __________________________________________________________________________ BEFORE YOU BEGIN DRIVER INSTALLATION Before beginning the driver installation, you should exit the X server. In addition you should set your default run level so you will boot to a vga console and not boot directly into X (please consult the documentation that came with your Linux distribution if you are unsure how to do this; this is normally done by modifying your /etc/inittab file). This will make it easier to recover if there is a problem during the installation. After installing the driver you must edit your XF86Config file before the newly installed driver will be used. See the section below entitled EDITING YOUR XF86CONFIG FILE. INTRODUCTION TO THE NEW NVIDIA DRIVER INSTALLER After you have downloaded NVIDIA-Linux-x86-1.0-5336-pkg1.run, begin installation by exiting X, cd'ing into the directory containing the downloaded file, and run: sh NVIDIA-Linux-x86-1.0-5336-pkg1.run The .run file is a self-extracting archive. When the .run file is executed, it extracts the contents of the archive, and runs the contained `nvidia-installer` utility, which will walk you through installation of the NVIDIA driver. The .run file accepts many commandline options. Here are a few of the more common options: --info Print embedded info about the .run file and exit. --check Check integrity of the archive and exit. --extract-only Extract the contents of ./NVIDIA-Linux-x86-1.0-5336.run, but do not run 'nvidia-installer'. --help Print usage information for the common commandline options and exit. --advanced-options Print usage information for the common commandline options as well as the advanced options, and then exit. Installation will also install the utility `nvidia-installer`, which may be later used to uninstall drivers, auto-download updated drivers, etc. KERNEL INTERFACES The NVIDIA kernel module has a kernel interface layer which must be compiled specifically for the configuration and version of the kernel you are running. NVIDIA distributes the source code to this kernel interface layer, as well as a precompiled version for many of the kernels distributed by some popular distributions. When the installer is run, it will determine if it has a precompiled kernel interface for the kernel you are running. If it does not have one, it will check if there is one on the NVIDIA ftp site (assuming you have an internet connection), and download it. If a precompiled kernel interface is found that matches your kernel, then that will be linked[1] against the binary portion of the NVIDIA kernel module. The result of this operation will be a kernel module appropriate for your kernel. If no matching precompiled kernel interface is found, then the installer will compile the kernel interface for you. However, first it will check that you have the correct kernel headers intalled on your system. If the installer must compile the kernel interface, then you must install the kernel-sources package for your kernel. [1] NOTE: installation requires that you have a linker installed. The linker, usually '/usr/bin/ld', is part of the binutils package; please be sure you have this package installed prior to installing the NVIDIA driver. FEATURES OF NVIDIA-INSTALLER o Uninstall: Driver installation will backup any conflicting files and record what new files are installed on the system. You may run: nvidia-installer --uninstall to uninstall the current driver; this will remove any files that were installed on the system, and restore any backed up files. Installing new drivers implicitly uninstalls any previous drivers. o Auto-Updating: If you run: nvidia-installer --latest the utility will connect to NVIDIA's FTP site, and report the latest driver version and the url to the latest driver file. If you run: nvidia-installer --update the utility will connect to NVIDIA's FTP site, download the most recent driver file, and install it. o Multiple user interfaces: The installer will use an ncurses-based user interface if it can find the correct ncurses library, otherwise, it will fall back to a simple commandline user interface. To disable use of the ncurses user interface, use the option '--ui=none'. o Updated Kernel Interfaces: The installer has the ability to download updated precompiled kernel interfaces from the NVIDIA FTP site (for kernels that were released after the NVIDIA driver release). NVIDIA-INSTALLER FAQ Q: How do I extract the contents of the .run file without actually installing the driver? A: Run: sh NVIDIA-Linux-x86-1.0-5336-pkg1.run --extract-only This will create the directory NVIDIA-Linux-x86-1.0-5336-pkg1 which contains the uncompressed contents of the .run file. Q: How can I see the source code to the kernel interface layer? A: The source files to the kernel interface layer are in the usr/src/nv directory of the extracted .run file. To get to these sources, run: sh NVIDIA-Linux-x86-1.0-5336-pkg1.run --extract-only cd NVIDIA-Linux-x86-1.0-5336-pkg1/usr/src/nv/ Q: I just upgraded my kernel, and now the NVIDIA kernel module will not load. What is wrong? A: The kernel interface layer of the NVIDIA kernel module must be compiled specifically for the configuration and version of your kernel. If you upgrade your kernel, then the simplest solution is to reinstall the driver. ADVANCED: You can install the NVIDIA kernel module for a non running kernel (for example: in the situation where you just built and installed a new kernel, but have not rebooted yet) with a command line such as this: sh NVIDIA-Linux-x86-1.0-5336-pkg1.run --kernel-name='KERNEL_NAME' Where 'KERNEL_NAME' is what `uname -r` would report if the target kernel were running. Q: Why does NVIDIA not provide rpms anymore? A: Not every Linux distribution uses rpm, and NVIDIA wanted a single solution that would work across all Linux distributions. As indicated in the NVIDIA Software License, Linux distributions are welcome to repackage and redistribute the NVIDIA Linux driver in whatever package format they wish. Q: nvidia-installer does not work on my computer. How can I install the driver contained within the .run file? A: To install the NVIDIA driver contained within the .run file without using nvidia-installer, you can use the included Makefile: sh ./NVIDIA-Linux-x86-1.0-5336-pkg1.run --extract-only cd NVIDIA-Linux-x86-1.0-5336-pkg1 make install This method of installation is not recommended, and is only provided as a last resort, should nvidia-installer not work correctly on your system. Q: Can the nvidia-installer use a proxy server? A: Yes, because the ftp support in nvidia-installer is based on snarf, it will honor the FTP_PROXY, SNARF_PROXY, and PROXY environment variables. Q: What is the significance of the "pkg#" suffix on the .run file? A: The "pkg#" suffix is used to distinguish between .run files containing the same driver, but different sets of precompiled kernel interfaces. If a distribution releases a new kernel after an NVIDIA driver is released, the current NVIDIA driver can be repackaged to include a precompiled kernel interface for that newer kernel (in addition to all the precompiled kernel interfaces that were included in the previous package of the driver). .run files with the same version number, but different pkg numbers, only differ in what precompiled kernel interfaces are included. Additionally, .run files with higher pkg numbers will contain everything the .run files with lower .pkg numbers contain. Q: I have already installed NVIDIA-Linux-x86-1.0-5336-pkg1.run, but I see that NVIDIA-Linux-x86-1.0-5336-pkg2.run was just posted on the NVIDIA Linux driver download page. Should I download and install NVIDIA-Linux-x86-1.0-5336-pkg2.run? A: This is not necessary. The driver contained within all 1.0-5336 .run files will be identical. There is no need to reinstall. Q: Can I add my own precompiled kernel interfaces to a .run file? A: Yes, the "--add-this-kernel" .run file option will unpack the .run file, build a precompiled kernel interface for the currently running kernel, and repackage the .run file, appending "-custom" to the file name. This may be useful, for example. if you administer multiple Linux machines, each running the same kernel. Q: Where can I find the source code for the nvidia-installer utility? A: The nvidia-installer utility is released under the GPL. The latest source code for it is available at: ftp://download.nvidia.com/XFree86/nvidia-installer/ NVIDIA-INSTALLER ACKNOWLEDGEMENTS nvidia-installer was inspired by the loki_update tool: (http://www.lokigames.com/development/loki_update.php3.) The ftp and http support in nvidia-installer is based upon snarf 7.0: (http://www.xach.com/snarf/). The self-extracting archive (aka ".run file") is generated using makeself.sh: (http://www.megastep.org/makeself/) __________________________________________________________________________ (sec-03) EDITING YOUR XF86CONFIG FILE __________________________________________________________________________ When XFree86 4.0 was released, it used a slightly different XF86Config file syntax than the 3.x series did, and so to allow both 3.x and 4.x versions of XFree86 to co-exist on the same system, it was decided that XFree86 4.x was to use the configuration file "/etc/X11/XF86Config-4" if it existed, and only if that file did not exist would the file "/etc/X11/XF86Config" be used (actually, that is an over-simplification of the search criteria; please see the XF86Config man page for a complete description of the search path). Please make sure you know what configuration file XFree86 is using. If you are in doubt, look for a line beginning with "(==) Using config file:" in your XFree86 log file ("/var/log/XFree86.0.log"). This README will use "XF86Config" to refer to your configuration file, whatever it is named. If you do not have a working XF86Config file, there are several ways to start: there is a sample config file that comes with XFree86, and there is a sample config file included with the NVIDIA driver package (it gets installed in /usr/share/doc/NVIDIA_GLX-1.0/). You could also use a program like 'xf86config'; some distributions provide their own tool for generating an XF86Config file. For more on XF86Config file syntax, please refer to the man page. If you already have an XF86Config file working with a different driver (such as the 'nv' or 'vesa' driver), then all you need to do is find the relevant Device section and replace the line: Driver "nv" (or Driver "vesa") with Driver "nvidia" In the Module section, make sure you have: Load "glx" You should also remove the following lines: Load "dri" Load "GLcore" if they exist. There are also numerous options that can be added to the XF86Config file to fine-tune the NVIDIA XFree86 driver. Please see Appendix D for a complete list of these options. Once you have configured your XF86Config file, you are ready to restart X and begin using the accelerated OpenGL libraries. After you restart X, you should be able to run any OpenGL application and it will automatically use the new NVIDIA libraries. If you encounter any problems, please see the FREQUENTLY ASKED QUESTIONS section below. __________________________________________________________________________ (sec-04) FREQUENTLY ASKED QUESTIONS __________________________________________________________________________ Q: Where should I start when diagnosing display problems? A: One of the most useful tools for diagnosing problems is the XFree86 log file in /var/log (the file is named: "/var/log/XFree86.<#>.log", where "<#>" is the server number -- usually 0). Lines that begin with "(II)" are information, "(WW)" are warnings, and "(EE)" are errors. You should make sure that the correct config file (ie the config file you are editing) is being used; look for the line that begins with: "(==) Using config file:". Also check that the NVIDIA driver is being used, rather than the 'nv' or 'vesa' driver; you can look for: "(II) LoadModule: "nvidia"", and lines from the driver should begin with: "(II) NVIDIA(0)". Q: How can I increase the amount of data printed in the XFree86 log file? A: By default, the NVIDIA X driver prints relatively few messages to stderr and the XFree86 log file. If you need to troubleshoot, then it may be helpful to enable more verbose output by using the XFree86 command line options "-verbose" and "-logverbose" which can be used to set the verbosity level for the stderr and log file messages, respectively. The NVIDIA X driver will output more messages when the verbosity level is at or above 5 (XFree86 defaults to verbosity level 1 for stderr and level 3 for the log file). So, to enable verbose messaging from the NVIDIA X driver to both the log file and stderr, you could start X by doing the following: 'startx -- -verbose 5 -logverbose 5'. Q: My X server fails to start, and my XFree86 log file contains the error: "(EE) NVIDIA(0): Failed to initialize the NVIDIA kernel module!" A: Nothing will work if the NVIDIA kernel module does not function properly. If you see anything in the X log file like "(EE) NVIDIA(0): Failed to initialize the NVIDIA kernel module!" then there is most likely a problem with the NVIDIA kernel module. First, you should verify that if you installed from rpm that the rpm was built specifically for the kernel you are using. You should also check that the module is loaded ('/sbin/lsmod'); if it is not loaded try loading it explicitly with 'insmod' or 'modprobe' (be sure to exit the X server before installing a new kernel module). If you receive errors about unresolved symbols, then the kernel module has most likely been built using header files for a different kernel revision than what you are running. You can explicitly control what kernel header files are used when building the NVIDIA kernel module with the --kernel-include-dir option (see `sh NVIDIA-Linux-x86-1.0-5336-pkg1.run --advanced-options` for details). Please note that the convention for the location of kernel header files changed approximately at the time of the 2.4.0 kernel release, as did the location of kernel modules. If the kernel module fails to load properly, modprobe/insmod may be trying to load an older kernel module (assuming you have upgraded). cd'ing into the directory with the new kernel module and doing 'insmod ./nvidia.o' may help. Another cause may be that the /dev/nvidia* device files may be missing. Finally, the NVIDIA kernel module may print error messages indicating a problem -- to view these messages please check /var/log/messages, or wherever syslog is directed to place kernel messages. These messages are prepended with "NVRM". Q: X starts for me, but OpenGL applications terminate immediately. A: If X starts, but OpenGL causes problems, you most likely have a problem with other libraries in the way, or there are stale symlinks. See Appendix C for details. Sometimes, all it takes is to rerun 'ldconfig'. You should also check that the correct extensions are present; 'xdpyinfo' should show the "GLX", "NV-GLX" and "NVIDIA-GLX" extensions present. If these three extensions are not present, then there is most likely a problem with the glx module getting loaded or it is unable to implicitly load GLcore. Check your XF86Config file and make sure that you are loading glx (see "Editing Your XF86Config File" above). If your XF86Config file is correct, then check the XFree86 log file for warnings/errors pertaining to GLX. Also check that all of the necessary symlinks are in place (refer to Appendix C). Q: Installing the NVIDIA kernel module gives an error message like: #error Modules should never use kernel-headers system headers #error but headers from an appropriate kernel-source A: You need to install the source for the Linux kernel. In most situations you can fix this problem by installing the kernel-source package for your distribution Q: OpenGL applications exit with the following error message: Error: Could not open /dev/nvidiactl because the permissions are too restrictive. Please see the FREQUENTLY ASKED QUESTIONS section of /usr/share/doc/NVIDIA_GLX-1.0/README for steps to correct. A: It is likely that a security module for the PAM system may be changing the permissions on the NVIDIA device files. In most cases this security system works, but it can get confused. To correct this problem it is recommended that you disable this security feature. Different Linux distributions have different files to control this; please consult with your distributor for the correct method of disabling this security feature. As an example, if your system has the file /etc/security/console.perms then you should edit the file and remove the line that starts with "<dri>" (we have also received reports that additional references to <dri> in console.perms must be removed, but this has not been verified by NVIDIA). If instead your system has the file /etc/logindevperms then you should edit the file and remove the line that lists /dev/nvidiactl. The above steps will prevent the PAM security system from modifying the permissions on the NVIDIA device files. Next, you will need to reset the permissions on the device files back to their original permissions and owner. You can do that with the following commands: chmod 0666 /dev/nvidia* chown root /dev/nvidia* Q: OpenGL applications crash and print out the following warning: WARNING: Your system is running with a buggy dynamic loader. This may cause crashes in certain applications. If you experience crashes you can try setting the environment variable __GL_SINGLE_THREADED to 1. For more information please consult the FREQUENTLY ASKED QUESTIONS section in the file /usr/share/doc/NVIDIA_GLX-1.0/README. A: The dynamic loader on your system has a bug which will cause applications linked with pthreads, and that dlopen() libGL multiple times, to crash. This bug is present in older versions of the dynamic loader. Distributions that shipped with this loader include but are not limited to Red Hat Linux 6.2 and Mandrake Linux 7.1. Version 2.2 and later of the dynamic loader are known to work properly. If the crashing application is single threaded then setting the environment variable __GL_SINGLE_THREADED to 1 will prevent the crash. In the bash shell you would enter: export __GL_SINGLE_THREADED=1 and in csh and derivatives use: setenv __GL_SINGLE_THREADED 1 Previous releases of the NVIDIA Accelerated Linux Driver Set attempted to work around this problem, however the workaround caused problems with other applications and was removed after version 1.0-1541. Q: When I run Quake3, it crashes when changing video modes; what is wrong? A: You are probably experiencing the problem described above. Please check the text output for the "WARNING" message describe in the previous hint. Setting __GL_SINGLE_THREADED to 1 as described above, before running Quake3 will fix the problem. Q: My system runs, but seems unstable. What is wrong? A: Your stability problems may be AGP-related. See Appendix F for details. Q: The kernel module does not get loaded dynamically when X starts; I always have to do 'modprobe nvidia' first. What is wrong? A: Make sure the line "alias char-major-195 nvidia" appears in your module configuration file, generally one of "/etc/conf.modules", "/etc/modules.conf" or "/etc/modutils/alias"; consult the documentation that came with your distribution for details. Q: I cannot build the NVIDIA kernel module, or I can build the NVIDIA kernel module, but modprobe/insmod fails to load the module into my kernel. What is wrong? A: These problems are generally caused by the build using the wrong kernel header files (ie header files for a different kernel version than the one you are running). The convention used to be that kernel header files should be stored in "/usr/include/linux/", but that is deprecated in favor of "/lib/modules/`uname -r`/build/include". The nvidia-installer should be able to determine the location on your system; however, if you encounter a problem you can force the build to use certain header files by using the --kernel-include-dir option. Obviously, for this to work, you need the appropriate kernel header files installed on your system. Consult the documentation that came with your distribution; some distributions do not install the kernel header files by default, or they install headers that do not coincide properly with the kernel you are running. Q: Why do OpenGL applications run so slow? A: The application is probably using a different library still on your system, rather than the NVIDIA supplied OpenGL library. Please see APPENDIX C for details. Q: There are problems running Quake2. A: Quake2 requires some minor setup to get it going. First, in the Quake2 directory, the install creates a symlink called libGL.so that points at libMesaGL.so. This symlink should be removed or renamed. Then, to run Quake2 in OpenGL mode, you would type: 'quake2 +set vid_ref glx +set gl_driver libGL.so'. Quake2 does not seem to support any kind of full-screen mode, but you can run your X server at whatever resolution Quake2 runs at to emulate full-screen mode. Q: There are problems running Heretic II. A: Heretic II also installs, by default, a symlink called libGL.so in the application directory. You can remove or rename this symlink, since the system will then find the default libGL.so (which our drivers install in /usr/lib). From within Heretic II you can then set your render mode to OpenGL in the video menu. There is also a patch available to Heretic II from lokigames at: http://www.lokigames.com/products/heretic2/updates.php3 Q: Where can I get gl.h or glx.h so I can compile OpenGL programs? A: Most systems come with these header files preinstalled. However, NVIDIA provides its own gl.h and glx.h files which get installed in /usr/share/doc/NVIDIA_GLX-1.0/include/GL/. To use these files, either manually copy them into /usr/include/GL/, or instruct the installer to install these files in /usr/include/GL/ by passing the '--opengl-headers' option to the NVIDIA-Linux-x86-1.0-5336-pkg1.run file during installation. Q: Can I receive email notification of new NVIDIA Accelerated Linux Driver Set releases? A: Yes. Fill out the form at: http://www.nvidia.com/view.asp?FO=driver_update Q: My system hangs when vt-switching if I have rivafb enabled. A: Using both rivafb and the NVIDIA kernel module at the same time is currently broken. In general, using two independent software drivers to drive the same piece of hardware is a bad idea. Q: Compiling the NVIDIA kernel module gives this error: You appear to be compiling the NVIDIA kernel module with a compiler different from the one that was used to compile the running kernel. This may be perfectly fine, but there are cases where this can lead to unexpected behaviour and system crashes. If you know what you are doing and want to override this check, you can do so by setting IGNORE_CC_MISMATCH. In any other case, set the CC environment variable to the name of the compiler that was used to compile the kernel. A: You should compile the NVIDIA kernel module with the same compiler version that was used to compile your kernel. Some Linux kernel data structures are dependent on the version of gcc used to compile it; for example, in include/linux/spinlock.h: ... * Most gcc versions have a nasty bug with empty initializers. */ #if (__GNUC__ > 2) typedef struct { } rwlock_t; #define RW_LOCK_UNLOCKED (rwlock_t) { } #else typedef struct { int gcc_is_buggy; } rwlock_t; #define RW_LOCK_UNLOCKED (rwlock_t) { 0 } #endif If the kernel is compiled with gcc 2.x, but gcc 3.x is used when the kernel interface is compiled (or vice versa), the size of rwlock_t will vary, and things like ioremap will fail. To check what version of gcc was used to compile your kernel, you can examine the output of: cat /proc/version To check what version of gcc is currently in your $PATH, you can examine the output of: gcc -v Q: X fails with error "Failed to allocate LUT context DMA" A: This is one of the possible consequences of compiling the NVIDIA kernel interface with a different gcc version than used to compile the Linux kernel (see above). Q: What is NVIDIA's policy towards development series Linux kernels? A: NVIDIA does not officially support development series kernels. However, all the kernel module source code that interfaces with the Linux kernel is available in the usr/src/nv/ directory of the .run file. NVIDIA encourages members of the Linux community to develop patches to these source files to support development series kernels. A google search will most likely yield several community supported patches. Q: I recently updated various libraries on my system using my Linux distributor's update utility, and the NVIDIA graphics driver no longer works. What is wrong? A: Conflicting libraries may have been installed by your distribution's update utility; please see APPENDIX C: INSTALLED COMPONENTS for details on how to diagnose this. Q: `rpm --rebuild` gives an error "unknown option". A: Recent versions of rpm no longer support the "--rebuild" option; if you have such a version of rpm, you should instead use the command `rpmbuild --rebuild`. The `rpmbuild` executable is provided by the rpm-build package. Q: I am using either nForce of nForce2 internal graphics, and I see warnings like this in my XFree86.0.log file: Not using mode "1600x1200" (exceeds valid memory bandwidth usage) A: Integrated graphics have stricter memory bandwidth limitations that restrict the resolution and refresh rate of the modes you request. To work around this, you can reduce the maximum refresh rate by lowering the upper value of the "VertRefresh" range in the Monitor section of your XF86Config file. Though not recommended, you can disable the memory bandwidth test with the "NoBandWidthTest" XF86Config file option. Q: I have rebuilt the NVIDIA kernel module, but when I try to insert it, I get a message telling me I have unresolved symbols. A. Unresolved symbols are most often caused by a mismatch between your kernel sources and your running kernel. They must match for the NVIDIA kernel module to build correctly. Please make sure your kernel sources are installed and configured to match your running kernel. Q: How do I tell if I have my kernel sources installed? A: If you are running on a distro that uses RPM (Red Hat, Mandrake, SuSE, etc), then you can use RPM to tell you. At a shell prompt, type: `rpm -qa | grep kernel` and look at the output. You should see a package that corresponds to your kernel (often named something like kernel-2.4.18-3) and a kernel source package with the same version (often named something like kernel-source-2.4.18-3). If none of the lines seem to correspond to a source package, then you will probably need to install it. If the versions listed mismatch (ex: kernel-2.4.18-10 vs. kernel-source-2.4.18-3), then you will need to update the kernel-source package to match the installed kernel. If you have multiple kernels installed, you need to install the kernel-source package that corresponds to your *running* kernel (or make sure your installed source package matches the running kernel). You can do this by looking at the output of 'uname -r' and matching versions. Q: Why am I unable to load the NVIDIA kernel module that I compiled for the Red Hat Linux 7.3 2.4.18-3bigmem kernel? A: The kernel header files Red Hat Linux distributes for Red Hat Linux 7.3 2.4.18-3bigmem kernel are misconfigured. NVIDIA's precompiled kernel module for this kernel can be loaded, but if you wish to compile the NVIDIA kernel interface files yourself for this kernel, then you will need to perform the following: cd /lib/modules/`uname -r`/build/ cp configs/kernel-2.4.18-i686-bigmem.config .config make mrproper oldconfig dep Note: Red Hat Linux ships kernel header files that are simultaneously configured for ALL of their kernels for a particular distribution version. A header file generated at boot time sets up a few parameters that select the correct configuration. Rebuilding the kernel headers with the above commands will create header files suitable for the Red Hat Linux 7.3 2.4.18-3bigmem kernel configuration only, thus trashing the header files for the other configurations. Q: X takes a long time to start (possibly several minutes). What can I do? A: Most of the startx delay problems we have found are caused by incorrect data in video BIOSes about what display devices are possibly connected or what i2c port should be used for detection. You can work around these problems with the XF86Config option "IgnoreDisplayDevices" (please see the description in (app-d) APPENDIX D: XF86CONFIG OPTIONS). Q: Why does X use so much memory? A: When measuring any application's memory usage, you must be careful to distinguish between physical system RAM used and virtual mappings of shared resources. For example, most shared libraries exist only once in physical memory but are mapped into multiple processes. This memory should only be counted once when computing total memory usage. In the same way, the video memory on a graphics card or register memory on any device can be mapped into multiple processes. These mappings do not consume normal system RAM. This has been a frequently discussed topic on XFree86 mailing lists; see, for example: http://marc.theaimsgroup.com/?l=xfree-xpert&m=96835767116567&w=2 The `pmap` utility described in the above thread and available here: http://web.hexapodia.org/~adi/pmap.c is a useful tool in distinguishing between types of memory mappings. For example, while `top` may indicate that X is using several hundred MB of memory, the last line of output from pmap: mapped: 287020 KB writable/private: 9932 KB shared: 264656 KB reveals that X is really only using roughly 10MB of system RAM (the "writable/private" value). Note, also, that X must allocate resources on behalf of X clients (the window manager, your web browser, etc); X's memory usage will increase as more clients request resources such as pixmaps, and decrease as you close X applications. Q: OpenGL applications leak significant amounts of memory on my system! A: If your kernel is making use of the -rmap VM, the system may be leaking memory due to a memory management optimization introduced in -rmap14a. The -rmap VM has been adopted by several popular distributions, the memory leak is known to be present in some of the distribution kernels; it has been fixed in -rmap15e. If you suspect that your system is affected, please try upgrading your kernel or contact the distribution's vendor for assistance. Q: Some OpenGL applications (like Quake3 Arena) crash when I start them on Red Hat Linux 9.0. A: Some versions of the glibc package shipped by Red Hat that support TLS do not properly handle using dlopen() to access shared libraries which utilize some TLS models. This problem is exhibited, for example, when Quake3 Area dlopen()'s NVIDIA's libGL library. Please obtain at least glibc-2.3.2-11.9 which is available as an update from Red Hat. Q: I have installed the driver, but my Enable 3D Acceleration checkbox is still greyed out! What did I do wrong? A: Most distribution-provided configuration applets are not aware of the NVIDIA accelerated driver, and consequently will not update themselves when you install the driver. Your driver, if it has been installed properly, should function fine. Q: Where can I find the tarballs? A: Plain tarballs are no longer available. The .run file is a tarball with a shell script prepended. You can execute the .run file with the '--extract-only' option to unpack the tarball. Q: Where can I find older driver versions? A: Please visit ftp://download.nvidia.com/XFree86_40/. Q: X does not restore the vga console when run on a TV. I get this error message in my XFree86 log file: Unable to initialize the XFree86 int10 module; the console may not be restored correctly on your TV. A: The NVIDIA XFree86 driver uses the XFree86 Int10 module to save and restore console state on TV out, and will not be able to restore the console correctly if it cannot use the Int10 module. If you have built XFree86 yourself, please be sure you have built the Int10 module. If you are using a build of XFree86 provided by a Linux distribution, and are missing the Int10 module, please contact your distributor, Q: When changing settings in games like Quake 3 Arena, or Wolfstein Enemy Territry, the game crashes and I see this error: ...loading libGL.so.1: QGL_Init: dlopen libGL.so.1 failed: /usr/lib/tls/libGL.so.1: shared object cannot be dlopen()ed: static TLS memory too small A: These games close and reopen the NVIDIA OpenGL driver (via dlopen()/dlclose()) when settings are changed. On some versions of glibc (such as the one shipped with Red Hat Linux 9), there is a bug that leaks static TLS entries. This glibc bug causes subsequent re-loadings of the OpenGL driver to fail. This is fixed in more recent versions of glibc; see Red Hat bug #89692: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=89692 Q: X crashes during `startx`, and my XFree86.0.log file contains this error message: (EE) NVIDIA(0): Failed to obtain a shared memory identifier. A: The NVIDIA OpenGL driver and the NVIDIA X driver require shared memory to communicate; you must have CONFIG_SYSVIPC enabled in your kernel. Q: When I try to install the driver, the installer claims that X is running, even though I have exited X. What is wrong? A: The installer detects the presence of an X server by checking for X's lock files: /tmp/.X[n]-lock, where [n] is the number of the X Display (the installer checks for X Displays 0-7). If you have exited X, but one of these files have been left behind, then you will need to manually delete the lock file. DO NOT remove this file is X is still running. Q: Fonts are incorrectly sized after installing the NVIDIA driver. A: Incorrectly sized fonts are generally caused by a monitor reporting an incorrect physical size, which causes various X applications to render fonts at the wrong size. You can check what X thinks the physical size of your monitor is, by running: xdpyinfo | grep dimensions This will report the size in pixels, and in millimeters. If the sizes in millimeters are drastically incorrect, then you can correct this by adding the DisplaySize field to the monitor section of your XF86Config file (see the XF86Config manpage for details). You can check what your monitor reports its physical size is by running X with verbose logging: `startx -- -logverbose`. Then, search your XFree86.0.log file for a line that looks like: (II) NVIDIA(0): Max H-Image Size [cm]: horiz.: 36 vert.: 27 (the numbers will be different) The NVIDIA driver uses these values to compute the DPI. Q: I want to use Valgrind with OpenGL applications, but my distribution uses ELF TLS, and Valgrind cannot yet deal with NVIDIA's ELF TLS OpenGL. A: You can set the environment variable LD_ASSUME_KERNEL to something below "2.3.99" (for example: `export LD_ASSUME_KERNEL 2.3.98`). NVIDIA's OpenGL libraries contain an OS ABI ELF note that indicates the minimum kernel version that is required to use the library. The ELF TLS OpenGL libraries have an OS ABI of 2.3.99 (the first Linux kernel that contained the necessary LDT support for ELF TLS), while the non ELF TLS OpenGL libraries contain an OS ABI of 2.2.5. The run-time loader will not load libraries with an OS ABI greater than the current kernel version. The LD_ASSUME_KERNEL environment variable can be used to override the kernel version that the run-time loader uses in this test. By setting LD_ASSUME_KERNEL to any kernel version below 2.3.99, you can force the loader to not use the ELF TLS OpenGL libraries, and fall back to the regular OpenGL libraries. If, for some reason, you need to remove this OS ABI note from the NVIDIA OpenGL libraries, you can do so by passing the .run file the "--no-abi-note" option during installation. __________________________________________________________________________ (sec-05) CONTACTING US __________________________________________________________________________ There is an NVIDIA Linux Driver web forum. You can access it by going to www.nvnews.net and following the "Forum" and "Linux Discussion Area" links. This is the preferable tool for seeking help; users can post questions, answer other users' questions, and search the archives of previous postings. If all else fails, you can contact NVIDIA for support at: linux-bugs@nvidia.com. But please, only send email to this address after you have followed the FREQUENTLY ASKED QUESTIONS section in this README and asked for help on the nvnews.net web forum. __________________________________________________________________________ (sec-06) FURTHER RESOURCES __________________________________________________________________________ Linux OpenGL ABI http://oss.sgi.com/projects/ogl-sample/ABI/ NVIDIA Linux HowTo http://www.tldp.org/HOWTO/XFree86-Video-Timings-HOWTO/index.html OpenGL www.opengl.org The XFree86 Project www.xfree86.org #nvidia (irc.freenode.net) __________________________________________________________________________ (app-a) APPENDIX A: SUPPORTED NVIDIA GRAPHICS CHIPS __________________________________________________________________________ NVIDIA CHIP NAME DEVICE PCI ID RIVA TNT 0x0020 RIVA TNT2/TNT2 Pro 0x0028 Vanta/Vanta LT 0x002C RIVA TNT2 Ultra 0x0029 RIVA TNT2 Model 64/Model 64 Pro 0x002D Aladdin TNT2 0x00A0 GeForce 256 0x0100 GeForce DDR 0x0101 Quadro 0x0103 GeForce2 MX/MX 400 0x0110 GeForce2 MX 100/200 0x0111 Quadro2 MXR/EX/Go 0x0113 GeForce2 Integrated GPU 0x01A0 GeForce2 GTS/GeForce2 Pro 0x0150 GeForce2 Ti 0x0151 GeForce2 Ultra 0x0152 Quadro2 Pro 0x0153 GeForce4 MX 460 0x0170 GeForce4 MX 440 0x0171 GeForce4 MX 420 0x0172 GeForce4 MX 440-SE 0x0173 Quadro4 550 XGL 0x0178 Quadro NVS 0x017A GeForce4 MX 440 with AGP8X 0x0181 GeForce4 MX 440SE with AGP8X 0x0182 GeForce4 MX 420 with AGP8X 0x0183 GeForce4 MX 4000 0x0185 Quadro4 580 XGL 0x0188 Quadro NVS with AGP8X 0x018A Quadro4 380 XGL 0x018B GeForce4 MX Integrated GPU 0x01F0 GeForce3 0x0200 GeForce3 Ti 200 0x0201 GeForce3 Ti 500 0x0202 Quadro DCC 0x0203 GeForce4 Ti 4600 0x0250 GeForce4 Ti 4400 0x0251 GeForce4 Ti 4200 0x0253 Quadro4 900 XGL 0x0258 Quadro4 750 XGL 0x0259 Quadro4 700 XGL 0x025B GeForce4 Ti 4800 0x0280 GeForce4 Ti 4200 with AGP8X 0x0281 GeForce4 Ti 4800 SE 0x0282 Quadro4 980 XGL 0x0288 Quadro4 780 XGL 0x0289 GeForce FX 5800 Ultra 0x0301 GeForce FX 5800 0x0302 Quadro FX 2000 0x0308 Quadro FX 1000 0x0309 GeForce FX 5600 Ultra 0x0311 GeForce FX 5600 0x0312 GeForce FX 5600XT 0x0314 GeForce FX 5200 0x0320 GeForce FX 5200 Ultra 0x0321 GeForce FX 5200 0x0322 GeForce FX 5200SE 0x0323 Quadro NVS 280 PCI 0x032A Quadro FX 500 0x032B GeForce FX 5900 Ultra 0x0330 GeForce FX 5900 0x0331 GeForce FX 5900XT 0x0332 GeForce FX 5950 Ultra 0x0333 Quadro FX 3000 0x0338 GeForce FX 5700 Ultra 0x0341 GeForce FX 5700 0x0342 Quadro FX 1100 0x034E GeForce2 Go 0x0112 GeForce4 440 Go 0x0174 GeForce FX Go5600 0x031A GeForce FX Go5650 0x031B Quadro FX Go700 0x031C GeForce FX Go5200 0x0324 GeForce FX Go5250 0x0325 GeForce FX Go5200 32M/64M 0x0328 GeForce FX Go5300 0x032C GeForce FX Go5100 0x032D GeForce FX Go5700 0x0348 __________________________________________________________________________ (app-b) APPENDIX B: MINIMUM SOFTWARE REQUIREMENTS __________________________________________________________________________ o linux kernel 2.2.12 # cat /proc/version o XFree86 4.0.1 # XFree86 -version o Kernel modutils 2.1.121 # insmod -V If you need to build the NVIDIA kernel module: o binutils 2.9.5 # size --version o GNU make 3.77 # make --version o gcc 2.91.66 # gcc --version If you build from source rpms: o spec-helper rpm # rpm -qi spec-helper All official stable kernel releases from 2.2.12 and up are supported; "prerelease" versions such as "2.4.3-pre2" are not supported, nor are development series kernels such as 2.3.x or 2.5.x. The linux kernel can be downloaded from www.kernel.org or one of its mirrors. binutils and gcc can be retrieved from www.gnu.org or one of its mirrors. If you are using XFree86, but do not have a file /var/log/XFree86.0.log, then you probably have a 3.x version of XFree86 and must upgrade. If you are setting up XFree86 4.x for the first time, it is often easier to begin with one of the open source drivers that ships with XFree86 (either 'nv', 'vga' or 'vesa'). Once XFree86 is operating properly with the open source driver, then it is easier to switch to the nvidia driver. Note that newer NVIDIA GPUs may not work with older versions of the "nv" driver shipped with XFree86. For example, the "nv" driver that shipped with XFree86 version 4.0.1 did not recognize the GeForce2 family and the Quadro2 MXR GPUs. However, this was fixed in XFree86 version 4.0.2 (XFree86 can be retrieved from www.xfree86.org). These software packages may also be available through your linux distributor. __________________________________________________________________________ (app-c) APPENDIX C: INSTALLED COMPONENTS __________________________________________________________________________ The NVIDIA Accelerated Linux Driver Set consists of the following components (the file in parenthesis is the full name of the component after installation; "x.y.z" denotes the current version -- in these cases appropriate symlinks are created during installation): o An XFree86 driver (/usr/X11R6/lib/modules/drivers/nvidia_drv.o); this driver is needed by XFree86 to use your NVIDIA hardware. The nvidia_drv.o driver is binary compatible with XFree86 4.0.1 and greater. o A GLX extension module for XFree86 (/usr/X11R6/lib/modules/extensions/libglx.so.x.y.z); this module is used by XFree86 to provide server-side glx support. o An OpenGL library (/usr/lib/libGL.so.x.y.z); this library provides the API entry points for all OpenGL and GLX function calls. It is linked to at run-time by OpenGL applications. o An OpenGL core library (/usr/lib/libGLcore.so.x.y.z); this library is implicitly used by libGL and by libglx. It contains the core accelerated 3D functionality. You should not explicitly load it in your XF86Config file -- that is taken care of by libglx. o Two XvMC (X-Video Motion Compensation) libraries: a static library and a shared library (/usr/X11R6/lib/libXvMCNVIDIA.a, /usr/X11R6/lib/libXvMCNVIDIA.so.x.y.z); please see (app-p) APPENDIX P: XVMC SUPPORT for details. o A kernel module (/lib/modules/`uname -r`/video/nvidia.o or /lib/modules/`uname -r`/kernel/drivers/video/nvidia.o). This kernel module provides low-level access to your NVIDIA hardware for all of the above components. It is generally loaded into the kernel when the X server is started, and is used by the XFree86 driver and OpenGL. nvidia.o consists of two pieces: the binary-only core, and a kernel interface that must be compiled specifically for your kernel version. Note that the linux kernel does not have a consistent binary interface like XFree86, so it is important that this kernel interface be matched with the version of the kernel that you are using. This can either be accomplished by compiling yourself, or using precompiled binaries provided for the kernels shipped with some of the more common linux distributions. o OpenGL and GLX header files (/usr/share/doc/NVIDIA_GLX-1.0/include/GL/gl.h, and /usr/share/doc/NVIDIA_GLX-1.0/include/GL/glx.h). These files can also be installed in /usr/include/GL/ by passing the "--opengl-headers" option to the .run file during installation. o ELF TLS OpenGL and OpenGL core libraries (/usr/lib/tls/libGL.so.x.y.z and /usr/lib/tls/libGLcore.so.x.y.z). Linux systems that utilize glibc 2.3 or greater with tls support enabled, use a new mechanism for thread local storage (TLS). This mechanism is incompatible with NVIDIA's previous thread local storage support; therefore, special ELF TLS libraries are provided, and installed in /usr/lib/tls/ on systems that support it. The runtime loader will select between the OpenGL libraries installed in /usr/lib/, and those installed in /usr/lib/tls/. It should also be noted that this new TLS mechanism also affects the GLX extension module (libglx.so.x.y.z). However, because the XFree86 loader does not know how to select between tls and non-tls libraries, the correct libglx library is automatically installed in /usr/X11R6/lib/modules/extensions/. You can determine if your glibc uses the new thread local storage mechanism by executing the command: /lib/libc.so.6 | grep "Thread-local storage support included." The above command will print "Thread-local storage support included." on systems that support the new thread local storage. o The application nvidia-installer (/usr/bin/nvidia-installer) is NVIDIA's tool for installing and updating NVIDIA drivers. Please see (sec-03) EDITING YOUR XF86CONFIG FILE for a more thorough description. Problems will arise if applications use the wrong version of a library. This can be the case if there are either old libGL libraries or stale symlinks left lying around. If you think there may be something awry in your installation, check that the following files are in place (these are all the files of the NVIDIA Accelerated Linux Driver Set, plus their symlinks): /usr/X11R6/lib/modules/drivers/nvidia_drv.o /usr/X11R6/lib/modules/extensions/libglx.so.x.y.z /usr/X11R6/lib/modules/extensions/libglx.so -> libglx.so.x.y.z /usr/lib/libGL.so.x.y.z /usr/lib/libGL.so.x -> libGL.so.x.y.z /usr/lib/libGL.so -> libGL.so.x /usr/lib/libGLcore.so.x.y.z /usr/lib/libGLcore.so.x -> libGLcore.so.x.y.z /lib/modules/`uname -r`/video/nvidia.o, or /lib/modules/`uname -r`/kernel/drivers/video/nvidia.o Installation will also create the /dev files: crw-rw-rw- 1 root root 195, 0 Feb 15 17:21 nvidia0 crw-rw-rw- 1 root root 195, 1 Feb 15 17:21 nvidia1 crw-rw-rw- 1 root root 195, 2 Feb 15 17:21 nvidia2 crw-rw-rw- 1 root root 195, 3 Feb 15 17:21 nvidia3 crw-rw-rw- 1 root root 195, 255 Feb 15 17:21 nvidiactl If there are other libraries whose "soname" conflicts with that of the NVIDIA libraries, ldconfig may create the wrong symlinks. It is recommended that you manually remove or rename conflicting libraries (be sure to rename clashing libraries to something that ldconfig will not look at -- we have found that prepending "XXX" to a library name generally does the trick), rerun 'ldconfig', and check that the correct symlinks were made. Some libraries that often create conflicts are "/usr/X11R6/lib/libGL.so*" and "/usr/X11R6/lib/libGLcore.so*". If the libraries checks out, then verify that the application is using the correct libraries. For example, to check that the application /usr/X11R6/bin/gears is using the NVIDIA libraries, you would do: $ ldd /usr/X11R6/bin/gears libglut.so.3 => /usr/lib/libglut.so.3 (0x40014000) libGLU.so.1 => /usr/lib/libGLU.so.1 (0x40046000) libGL.so.1 => /usr/lib/libGL.so.1 (0x40062000) libc.so.6 => /lib/libc.so.6 (0x4009f000) libSM.so.6 => /usr/X11R6/lib/libSM.so.6 (0x4018d000) libICE.so.6 => /usr/X11R6/lib/libICE.so.6 (0x40196000) libXmu.so.6 => /usr/X11R6/lib/libXmu.so.6 (0x401ac000) libXext.so.6 => /usr/X11R6/lib/libXext.so.6 (0x401c0000) libXi.so.6 => /usr/X11R6/lib/libXi.so.6 (0x401cd000) libX11.so.6 => /usr/X11R6/lib/libX11.so.6 (0x401d6000) libGLcore.so.1 => /usr/lib/libGLcore.so.1 (0x402ab000) libm.so.6 => /lib/libm.so.6 (0x4048d000) libdl.so.2 => /lib/libdl.so.2 (0x404a9000) /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000) libXt.so.6 => /usr/X11R6/lib/libXt.so.6 (0x404ac000) Note the files being used for libGL and libGLcore -- if they are something other than the NVIDIA libraries, then you will need to either remove the libraries that are getting in the way, or adjust your ld search path. If any of this seems foreign to you, then you may want to read the man pages for "ldconfig" and "ldd" for pointers. __________________________________________________________________________ (app-d) APPENDIX D: XF86CONFIG OPTIONS __________________________________________________________________________ The following driver options are supported by the NVIDIA XFree86 driver: Option "NvAGP" "integer" Configure AGP support. Integer argument can be one of: 0 : disable agp 1 : use NVIDIA's internal AGP support, if possible 2 : use AGPGART, if possible 3 : use any agp support (try AGPGART, then NVIDIA's AGP) Please note that NVIDIA's internal AGP support cannot work if AGPGART is either statically compiled into your kernel or is built as a module, but loaded into your kernel (some distributions load AGPGART into the kernel at boot up). Default: 3 (the default was 1 until after 1.0-1251). Option "NoLogo" "boolean" Disable drawing of the NVIDIA logo splash screen at X startup. Default: the logo is drawn. Option "RenderAccel" "boolean" Enable or disable hardware acceleration of the RENDER extension. THIS OPTION IS EXPERIMENTAL. ENABLE IT AT YOUR OWN RISK. There is no correctness test suite for the RENDER extension so NVIDIA can not verify that RENDER acceleration works correctly. Default: hardware acceleration of the RENDER extension is disabled. Option "NoRenderExtension" "boolean" Disable the RENDER extension. Other than recompiling the X-server, XFree86 does not seem to have another way of disabling this. Fortunatly, we can control this from the driver so we export this option. This is useful in depth 8 where RENDER would normally steal most of the default colormap. Default: RENDER is offered when possible. Option "UBB" "boolean" Enable or disable Unified Back Buffer on any Quadro based GPUs (Quadro4 NVS excluded); please see Appendix M for a description of UBB. This option has no affect on non-Quadro chipsets. Default: UBB is on for Quadro chipsets. Option "NoFlip" "boolean" Disable OpenGL flipping; please see Appendix M for a description. Default: OpenGL will swap by flipping when possible. Option "DigitalVibrance" "integer" Enables Digital Vibrance Control. The range of valid values are 0 through 255. This feature is not available on products older than GeForce2. Default: 0. Option "Dac8Bit" "boolean" Most Quadro parts by default use a 10 bit color look up table (LUT) by default; setting this option to TRUE forces these graphics chips to use an 8 bit (LUT). Default: a 10 bit LUT is used, when available. Option "Overlay" "boolean" Enables RGB workstation overlay visuals. This is only supported on Quadro4 and Quadro FX chips (Quadro4 NVS excluded) in depth 24. This option causes the server to advertise the SERVER_OVERLAY_VISUALS root window property and GLX will report single and double buffered, Z-buffered 16 bit overlay visuals. The transparency key is pixel 0x0000 (hex). There is no gamma correction support in the overlay plane. This feature requires XFree86 version 4.1.0 or newer. NV17/18 based Quadros (ie. 500/550 XGL) have additional restrictions, namely, overlays are not supported in TwinView mode or with virtual desktops larger than 2046x2047 in any dimension (eg. it will not work in 2048x1536 modes). Quadro 7xx/9xx and Quadro FX will offer overlay visuals in these modes (TwinView, or virtual desktops larger than 2046x2047), but the overlay will be emulated with a substantial performance penalty. Default: off. Option "CIOverlay" "boolean" Enables Color Index workstation overlay visuals with identical restrictions to Option "Overlay" above. The server will offer visuals both with and without a transparency key. These are depth 8 PseudoColor visuals. Enabling Color Index overlays on X servers older than XFree86 4.3 will force the RENDER extension to be disabled due to bugs in the RENDER extension in older X servers. Default: off. Option "TransparentIndex" "integer" When color index overlays are enabled, use this option to choose which pixel is used for the transparent pixel in visuals featuring transparent pixels. This value is clamped between 0 and 255 (Note: some applications such as Alias/Wavefront's Maya require this to be zero in order to work correctly). Default: 0. Option "OverlayDefaultVisual" "boolean" When overlays are used, this option sets the default visual to an overlay visual thereby putting the root window in the overlay. This option is not recommended for RGB overlays. Default: off. Option "SWCursor" "boolean" Enable or disable software rendering of the X cursor. Default: off. Option "HWCursor" "boolean" Enable or disable hardware rendering of the X cursor. Default: on. Option "CursorShadow" "boolean" Enable or disable use of a shadow with the hardware accelerated cursor; this is a black translucent replica of your cursor shape at a given offset from the real cursor. This option is only available on GeForce2 or better hardware (ie everything but TNT/TNT2, GeForce 256, GeForce DDR and Quadro). Default: no cursor shadow. Option "CursorShadowAlpha" "integer" The alpha value to use for the cursor shadow; only applicable if CursorShadow is enabled. This value must be in the range [0, 255] -- 0 is completely transparent; 255 is completely opaque. Default: 64. Option "CursorShadowXOffset" "integer" The offset, in pixels, that the shadow image will be shifted to the right from the real cursor image; only applicable if CursorShadow is enabled. This value must be in the range [0, 32]. Default: 4. Option "CursorShadowYOffset" "integer" The offset, in pixels, that the shadow image will be shifted down from the real cursor image; only applicable if CursorShadow is enabled. This value must be in the range [0, 32]. Default: 2. Option "ConnectedMonitor" "string" Allows you to override what the NVIDIA kernel module detects is connected to your video card. This may be useful, for example, if you use a KVM (keyboard, video, mouse) switch and you are switched away when X is started. In such a situation, the NVIDIA kernel module cannot detect what display devices are connected, and the NVIDIA X driver assumes you have a single CRT. Valid values for this option are "CRT" (cathode ray tube), "DFP" (digital flat panel), or "TV" (television); if using TwinView, this option may be a comma-separated list of display devices; e.g.: "CRT, CRT" or "CRT, DFP". NOTE: anything attached to a 15 pin VGA connector is regarded by the driver as a CRT. "DFP" should only be used to refer to flatpanels connected via a DVI port. Default: string is NULL. Option "UseEdidFreqs" "boolean" This option causes the X server to use the HorizSync and VertRefresh ranges given in a display device's EDID, if any. EDID provided range information will override the HorizSync and VertRefresh ranges specified in the Monitor section. If a display device does not provide an EDID, or the EDID does not specify an hsync or vrefresh range, then the X server will default to the HorizSync and VertRefresh ranges specified in the Monitor section. Option "IgnoreEDID" "boolean" Disable probing of EDID (Extended Display Identification Data) from your monitor. Requested modes are compared against values gotten from your monitor EDIDs (if any) during mode validation. Some monitors are known to lie about their own capabilities. Ignoring the values that the monitor gives may help get a certain mode validated. On the other hand, this may be dangerous if you do not know what you are doing. Default: Use EDIDs. Option "NoDDC" "boolean" Synonym for "IgnoreEDID" Option "FlatPanelProperties" "string" Requests particular properties of any connected flat panels as a comma-separated list of property=value pairs. Currently, the only two available properties are 'Scaling' and 'Dithering'. The possible values for 'Scaling' are: 'default' (the driver will use whatever scaling state is current), 'native' (the driver will use the flat panel's scaler, if it has one), 'scaled' (the driver will use the NVIDIA scaler, if possible), 'centered' (the driver will center the image, if possible), and 'aspect-scaled' (the driver will scale with the NVIDIA scaler, but keep the aspect ratio correct). The possible values for 'Dithering' are: 'default' (the driver will decide when to dither), 'enabled' (the driver will always dither when possible), and 'disabled' (the driver will never dither). If any property is not specified, it's value shall be 'default'. An example properties string might look like: "Scaling = centered, Dithering = enabled" Option "UseInt10Module" "boolean" Enable use of the XFree86 Int10 module to soft-boot all secondary cards, rather than POSTing the cards through the NVIDIA kernel module. Default: off (POSTing is done through the NVIDIA kernel module). Option "TwinView" "boolean" Enable or disable TwinView. Please see APPENDIX I for details. Default: TwinView is disabled. Option "TwinViewOrientation" "string" Controls the relationship between the two display devices when using TwinView. Takes one of the following values: "RightOf" "LeftOf" "Above" "Below" "Clone". Please see APPENDIX I for details. Default: string is NULL. Option "SecondMonitorHorizSync" "range(s)" This option is like the HorizSync entry in the Monitor section, but is for the second monitor when using TwinView. Please see APPENDIX I for details. Default: none. Option "SecondMonitorVertRefresh" "range(s)" This option is like the VertRefresh entry in the Monitor section, but is for the second monitor when using TwinView. Please see APPENDIX I for details. Default: none. Option "MetaModes" "string" This option describes the combination of modes to use on each monitor when using TwinView. Please see APPENDIX I for details. Default: string is NULL. Option "NoTwinViewXineramaInfo" "boolean" When in TwinView, the NVIDIA X driver normally provides a Xinerama extension that X clients (such as window managers) can use to to discover the current TwinView configuration. Some window mangers can get confused by this information, so this option is provided to disable this behavior. Default: TwinView Xinerama information is provided. Option "TVStandard" "string" Please see (app-j) APPENDIX J: CONFIGURING TV-OUT. Option "TVOutFormat" "string" Please see (app-j) APPENDIX J: CONFIGURING TV-OUT. Option "TVOverScan" "Decimal value in the range 0.0 to 1.0" Valid values are in the range 0.0 through 1.0; please see (app-j) APPENDIX J: CONFIGURING TV-OUT. Option "Stereo" "integer" Enable offering of quad-buffered stereo visuals on Quadro. Integer indicates the type of stereo glasses being used: 1 - DDC glasses. The sync signal is sent to the glasses via the DDC signal to the monitor. These usually involve a passthrough cable between the monitor and video card. 2 - "Blueline" glasses. These usually involve a passthrough cable between the monitor and video card. The glasses know which eye to display based on the length of a blue line visible at the bottom of the screen. When in this mode, the root window dimensions are one pixel shorter in the Y dimension than requested. This mode does not work with virtual root window sizes larger than the visible root window size (desktop panning). 3 - Onboard stereo support. This is usually only found on professional cards. The glasses connect via a DIN connector on the back of the video card. 4 - TwinView clone mode stereo (aka "passive" stereo). On video cards that support TwinView, the left eye is displayed on the first display, and the right eye is displayed on the second display. This is normally used in conjuction with special projectors to produce 2 polarized images which are then viewed with polarized glasses. To use this stereo mode, you must also configure TwinView in clone mode with the same resolution, panning offset, and panning domains on each display. Stereo is only available on Quadro cards. Stereo options 1, 2, and 3 (aka "active" stereo) may be used with TwinView if all modes within each metamode have identical timing values. Please see (app-l) APPENDIX L: PROGRAMMING MODES for suggestions on making sure the modes within your metamodes are identical. The identical modeline requirement is not necessary for Stereo option 4 ("passive" stereo). Currently, stereo operation may be "quirky" on the original Quadro (NV10) chip and left-right flipping may be erratic. We are trying to resolve this issue for a future release. Default: Stereo is not enabled. Stereo options 1, 2, and 3 (aka "active" stereo) are not supported on Digital Flatpanels. Option "AllowDFPStereo" "boolean" By default, the NVIDIA X driver performs a check which disables active stereo (stereo options 1, 2, and 3) if the X screen is driving a DFP. The "AllowDFPStereo" option bypasses this check. Option "NoBandWidthTest" "boolean" As part of mode validation, the X driver tests if a given mode fits within the hardware's memory bandwidth constraints. This option disables this test. Default: the memory bandwidth test is performed. Option "IgnoreDisplayDevices" "string" This option tells the NVIDIA kernel module to completely ignore the indicated classes of display devices when checking what display devices are connected. You may specify a comma-separated list containing any of "CRT", "DFP", and "TV". For example: Option "IgnoreDisplayDevices" "DFP, TV" will cause the NVIDIA driver to not attempt to detect if any flatpanels or TVs are connected. This option is not normally necessary; however, some video BIOSes contain incorrect information about what display devices may be connected, or what i2c port should be used for detection. These errors can cause long delays in starting X. If you are experiencing such delays, you may be able to avoid this by telling the NVIDIA driver to ignore display devices which you know are not connected. NOTE: anything attached to a 15 pin VGA connector is regarded by the driver as a CRT. "DFP" should only be used to refer to flatpanels connected via a DVI port. Option "MultisampleCompatibility" "boolean" Enable or disable the use of separate front and back multisample buffers. This will consume more memory but is necessary for correct output when rendering to both the front and back buffers of a multisample or FSAA drawable. This option is necessary for correct operation of SoftImage XSI. Default: a singlemultisample buffer is shared between the front and back buffers. Option "NoPowerConnectorCheck" "boolean" The NVIDIA X driver will abort X server initialization if it detects that a GPU that requires an external power connector does not have an external power connector plugged in. This option can be used to bypass this test. Default: the power connector test is performed. __________________________________________________________________________ (app-e) APPENDIX E: OPENGL ENVIRONMENT VARIABLE SETTINGS __________________________________________________________________________ FULL SCENE ANTIALIASING Antialiasing is a technique used to smooth the edges of objects in a scene to reduce the jagged "stairstep" effect that sometimes appears. Full-scene antialiasing is supported on GeForce or newer hardware. By setting the appropriate environment variable, you can enable full-scene antialiasing in any OpenGL application on these GPUs. Several anti-aliasing methods are available and you can select between them by setting the __GL_FSAA_MODE environment variable appropriately. Note that increasing the number of samples taken during FSAA rendering may decrease performance. The following tables describe the possible values for __GL_FSAA_MODE and their effect on various NVIDIA GPUs. __GL_FSAA_MODE GeForce, GeForce2, Quadro, and Quadro2 Pro ----------------------------------------------------------------------- 0 FSAA disabled 1 FSAA disabled 2 FSAA disabled 3 1.5 x 1.5 Supersampling 4 2 x 2 Supersampling 5 FSAA disabled 6 FSAA disabled 7 FSAA disabled __GL_FSAA_MODE GeForce4 MX, GeForce4 4xx Go, Quadro4 380,550,580 XGL, and Quadro4 NVS ----------------------------------------------------------------------- 0 FSAA disabled 1 2x Bilinear Multisampling 2 2x Quincunx Multisampling 3 FSAA disabled 4 2 x 2 Supersampling 5 FSAA disabled 6 FSAA disabled 7 FSAA disabled __GL_FSAA_MODE GeForce3, Quadro DCC, GeForce4 Ti, GeForce4 4200 Go, and Quadro4 700,750,780,900,980 XGL ----------------------------------------------------------------------- 0 FSAA disabled 1 2x Bilinear Multisampling 2 2x Quincunx Multisampling 3 FSAA disabled 4 4x Bilinear Multisampling 5 4x Gaussian Multisampling 6 2x Bilinear Multisampling by 4x Supersampling 7 FSAA disabled __GL_FSAA_MODE GeForce FX, Quadro FX ----------------------------------------------------------------------- 0 FSAA disabled 1 2x Bilinear Multisampling 2 2x Quincunx Multisampling 3 FSAA disabled 4 4x Bilinear Multisampling 5 4x Gaussian Multisampling 6 2x Bilinear Multisampling by 4x Supersampling 7 4x Bilinear Multisampling by 4x Supersampling ANISOTROPIC TEXTURE FILTERING Automatic anisotropic texture filtering can be enabled by setting the environment variable __GL_DEFAULT_LOG_ANISO, The useful values are: __GL_DEFAULT_LOG_ANISO GeForce/GeForce2/GeForce4 MX Description ----------------------------------------------------------------------- 0 No anisotropic filtering 1 Enable automatic anisotropic filtering __GL_DEFAULT_LOG_ANISO GeForce3/GeForce4 Ti/GeForce FX Description ----------------------------------------------------------------------- 0 No anisotropic filtering 1 Low anisotropic filtering 2 Medium anisotropic filtering 3 Maximum anisotropic filtering VBLANK SYNCING Setting the environment variable __GL_SYNC_TO_VBLANK to a non-zero value will force glXSwapBuffers to sync to your monitor's vertical refresh rate (perform a swap only during the vertical blanking period) on GeForce or newer hardware (ie: everything but TNT/TNT2 products). When using __GL_SYNC_TO_VBLANK with TwinView, OpenGL can only sync to one of the display devices; this may cause tearing corruption on the display device to which OpenGL is not syncing. You can use the environment variable __GL_SYNC_DISPLAY_DEVICE to specify to which display device OpenGL should sync. You should set this environment variable to the name of a display device; for example "CRT-1". Please look for the line "Connected display device(s):" in your XFree86.0.log file for a list of the display devices present and their names. DISABLING CPU SPECIFIC FEATURES Setting the environment variable __GL_FORCE_GENERIC_CPU to a non-zero value will inhibit the use of CPU specific features such as MMX, SSE, or 3DNOW!. Use of this option may result in performance loss. This option may be useful in conjunction with software such as the Valgrind memory debugger. __________________________________________________________________________ (app-f) APPENDIX F: CONFIGURING AGP __________________________________________________________________________ There are several choices for configuring the NVIDIA kernel module's use of AGP: you can choose to either use NVIDIA's AGP module (NVAGP), or the AGP module that comes with the linux kernel (AGPGART). This is controlled through the "NvAGP" option in your XF86Config file: Option "NvAgp" "0" ... disables AGP support Option "NvAgp" "1" ... use NVAGP, if possible Option "NvAgp" "2" ... use AGPGART, if possible Option "NvAGP" "3" ... try AGPGART; if that fails, try NVAGP The default is 3 (the default was 1 until after 1.0-1251). You should use the AGP module that works best with your AGP chip set. If you are experiencing problems with stability, you may want to start by disabling AGP and observing if that solves the problems. Then you can experiment with either of the other AGP modules. You can query the current AGP status at any time via the /proc filesystem interface (see APPENDIX O: PROC INTERFACE). To use the Linux AGPGART module, it will need to be compiled with your kernel, either statically linked in, or built as a module. NVIDIA AGP support cannot be used if AGPGART is loaded in the kernel. It is recommended that you compile AGPGART as a module and make sure that it is not loaded when trying to use NVIDIA AGP. Please also note that changing AGP drivers generally requires a reboot before the changes actually take effect. The following AGP chipsets are supported by NVIDIA's AGP; for all other chipsets it is recommended that you use the AGPGART module. o Intel 440LX o Intel 440BX o Intel 440GX o Intel 815 ("Solano") o Intel 820 ("Camino") o Intel 830 o Intel 840 ("Carmel") o Intel 845 ("Brookdale") o Intel 845G o Intel 850 ("Tehama") o Intel 860 ("Colusa") o AMD 751 ("Irongate") o AMD 761 ("IGD4") o AMD 762 ("IGD4 MP") o VIA 8371 o VIA 82C694X o VIA KT133 o VIA KT266 o RCC 6585HE o Micron SAMDDR ("Samurai") o Micron SCIDDR ("Scimitar") o nForce AGP o nForce 2 AGP o ALi 1621 o ALi 1631 o ALi 1647 o ALi 1651 o ALi 1671 o SiS 630 o SiS 633 o SiS 635 o SiS 645 o SiS 730 o SiS 733 o SiS 735 o SiS 745 If you are experiencing AGP stability problems, you should be aware of the following: o Support for the processor's Page Size Extension on Athlon Processors Some linux kernels have a conflicting cache attribute bug that is exposed by advanced speculative caching in newer AMD Athlon family processors (AMD Athlon XP, AMD Athlong 4, AMD Athlon MP, and Models 6 and above AMD Duron). This kernel bug usually shows up under heavy use of accelerated 3D graphics with an AGP graphics card. Linux distributions based on kernel 2.4.19 and later *should* incorporate the bug fix. But, older kernels require help from the user in ensuring that a small portion of advanced speculative caching is disabled (normally done through a kernel patch) and a boot option is specified in order to apply the whole fix. NVIDIA's driver automatically disables the small portion of advanced speculative caching for the affected AMD processors without the need to patch the kernel; it can be used even on kernels which do already incorporate the kernel bug fix. Additionally, for older kernels the user performs the boot option portion of the fix by explicitly disabling 4MB pages. This can be done from the boot command line by specifying: mem=nopentium Or by adding the following line to etc/lilo.conf: append = "mem=nopentium" o AGP drive strength BIOS setting (Via based mainboards) Many Via based mainboards allow adjusting the AGP drive strength in the system BIOS. The setting of this option largely affects system stability, the range between 0xEA and 0xEE seems to work best for NVIDIA hardware. Setting either nibble to 0xF generally restults in severe stability problems. If you decide to experiment with this, you need to be aware of the fact that you are doing so at your own risk and that you may render your system unbootable with improper settings until you reset the setting to a working value (w/ a PCI graphics card or by resetting the BIOS to its default values). o System BIOS version Make sure to have the latest system BIOS provided by the board manufacturer. o AGP Rate You may want to decrease the AGP rate setting if you are seeing lockups with the value you are currently using. You can do so by extracting the .run file: sh NVIDIA-Linux-x86-1.0-5336-pkg1.run --extract-only cd NVIDIA-Linux-x86-1.0-5336-pkg1/usr/src/nv/ Then edit os-registry.c, and make the following changes: - static int NVreg_ReqAGPRate = 7; + static int NVreg_ReqAGPRate = 4; /* force AGP Rate to 4x */ or + static int NVreg_ReqAGPRate = 2; /* force AGP Rate to 2x */ or + static int NVreg_ReqAGPRate = 1; /* force AGP Rate to 1x */ and then remove the two leading underscores: - { "__ReqAGPRate", &NVreg_ReqAGPRate }, + { "ReqAGPRate", &NVreg_ReqAGPRate }, Then recompile and load the new kernel module. On Athlon motherboards with the VIA KX133 or 694X chip set, such as the ASUS K7V motherboard, NVIDIA drivers default to AGP 2x mode to work around insufficient drive strength on one of the signals. You can force AGP 4x by setting NVreg_EnableVia4x to 1. Note that this may cause the system to become unstable. On ALi1541 and ALi1647 chipsets, NVIDIA drivers disable AGP to work around timing issues and signal integrity issues. You can force AGP to be enabled on these chipsets by setting NVreg_EnableALiAGP to 1. Note that this may cause the system to become unstable. __________________________________________________________________________ (app-g) APPENDIX G: ALI SPECIFIC ISSUES __________________________________________________________________________ The following tips may help stabilize problematic ALI systems: o Disable TURBO AGP MODE in the BIOS. o When using a P5A upgrade to BIOS Revision 1002 BETA 2. o When using 1007, 1007A or 1009 adjust the IO Recovery Time to 4 cycles. o AGP is disabled by default on some ALi chipsets (ALi1541, ALi1647) to work around severe system stability problems with these chipsets. See the comments for NVreg_EnableALiAGP in os-registry.c to force AGP on anyway. __________________________________________________________________________ (app-h) APPENDIX H: TNT SPECIFIC ISSUES __________________________________________________________________________ Most issues pertaining to SGRAM/SDRAM TNT cards should be resolved. There is the rare chance, however, that your video card has the wrong BIOS installed, and that this driver will continue to fail for you. If this driver fails for you, do the following: o watch your monitor as the system boots. The very first, brief screen will identify the type of video memory your card has. This will be either SGRAM or SDRAM. o edit the file "os-registry.c" from the kernel module sources. Look for the variable "NVreg_VideoMemoryTypeOverride". Set the value of the variable to the type of memory you have (numerically, see the line just above it). o since we do not normally use this variable, change the "#if 0" that is about 10 lines above the variable to "#if 1". o rebuild and reinstall the new driver ("make") __________________________________________________________________________ (app-i) APPENDIX I: CONFIGURING TWINVIEW __________________________________________________________________________ The TwinView feature is only supported on NVIDIA GPUs that support dual-display functionality, such as the GeForce2 MX, GeForce2 Go, Quadro2 MXR, Quadro2 Go, and any of the GeForce4 or Quadro4 GPUs. Please consult with your video card vendor to confirm that TwinView is supported on your card. TwinView is a mode of operation where two display devices (digital flat panels, CRTs, and TVs) can display the contents of a single X screen in any arbitrary configuration. This method of multiple monitor use has several distinct advantages over other techniques (such as Xinerama): o A single X screen is used. The NVIDIA driver conceals all information about multiple display devices from the X server; as far as X is concerned, there is only one screen. o Both display devices share one frame buffer. Thus, all the the functionality present on a single display (e.g. accelerated OpenGL) is available on TwinView. o No additional overhead is needed to emulate having a single desktop. If you are interested in using each display device as a separate X screen, please see (app-r) APPENDIX R: CONFIGURING MULTIPLE X SCREENS ON ONE CARD. XF86CONFIG TWINVIEW OPTIONS To enable TwinView, you must specify the following options in the Device section of your XF86Config file: Option "TwinView" Option "SecondMonitorHorizSync" "<hsync range(s)>" Option "SecondMonitorVertRefresh" "<vrefresh range(s)>" Option "MetaModes" "<list of metamodes>" You may also use any of the following options, though they are not required: Option "TwinViewOrientation" "<relationship of head 1 to head 0>" Option "ConnectedMonitor" "<list of connected display devices>" Please see the detailed descriptions of each option below: o TwinView This option is required to enable TwinView; without it, all other TwinView related options are ignored. o SecondMonitorHorizSync, SecondMonitorVertRefresh You specify the constraints of the second monitor through these options. The values given should follow the same convention as the "HorizSync" and "VertRefresh" entries in the Monitor section. As the XF86Config man page explains it: the ranges may be a comma separated list of distinct values and/or ranges of values, where a range is given by two distinct values separated by a dash. The HorizSync is given in kHz, and the VertRefresh is given in Hz. You may, if you trust your display devices' EDIDs, use the "UseEdidFreqs" option instead of these options (see APPENDIX D for a description of the "UseEdidFreqs" option). o MetaModes A single MetaMode describes what mode should be used on each display device at a given time. Multiple MetaModes list the combinations of modes and the sequence in which they should be used. When the NVIDIA driver tells X what modes are available, it is really the minimal bounding box of the MetaMode that is communicated to X, while the "per display device" mode is kept internal to the NVIDIA driver. In MetaMode syntax, modes within a MetaMode are comma separated, and multiple MetaModes are separated by semicolons. For example: "<mode name 0>, <mode name 1>; <mode name 2>, <mode name 3>" Where <mode name 0> is the name of the mode to be used on display device 0 concurrently with <mode name 1> used on display device 1. A mode switch will then cause <mode name 2> to be used on display device 0 and <mode name 3> to be used on display device 1. Here is a real MetaMode entry from the XF86Config sample config file: Option "MetaModes" "1280x1024,1280x1024; 1024x768,1024x768" If you want a display device to not be active for a certain MetaMode, you can use the mode name "NULL", or simply omit the mode name entirely: "1600x1200, NULL; NULL, 1024x768" or "1600x1200; , 1024x768" Optionally, mode names can be followed by offset information to control the positioning of the display devices within the virtual screen space; e.g.: "1600x1200 +0+0, 1024x768 +1600+0; ..." Offset descriptions follow the conventions used in the X "-geometry" command line option; i.e. both positive and negative offsets are valid, though negative offsets are only allowed when a virtual screen size is explicitly given in the XF86Config file. When no offsets are given for a MetaMode, the offsets will be computed following the value of the TwinViewOrientation option (see below). Note that if offsets are given for any one of the modes in a single MetaMode, then offsets will be expected for all modes within that single MetaMode; in such a case offsets will be assumed to be +0+0 when not given. When not explicitly given, the virtual screen size will be computed as the the bounding box of all MetaMode bounding boxes. MetaModes with a bounding box larger than an explicitly given virtual screen size will be discarded. A MetaMode string can be further modified with a "Panning Domain" specification; eg: "1024x768 @1600x1200, 800x600 @1600x1200" A panning domain is the area in which a display device's viewport will be panned to follow the mouse. Panning actually happens on two levels with TwinView: first, an individual display device's viewport will be panned within its panning domain, as long as the viewport is contained by the bounding box of the MetaMode. Once the mouse leaves the bounding box of the MetaMode, the entire MetaMode (ie all display devices) will be panned to follow the mouse within the virtual screen. Note that individual display devices' panning domains default to being clamped to the position of the display devices' viewports, thus the default behavior is just that viewports remain "locked" together and only perform the second type of panning. The most beneficial use of panning domains is probably to eliminate dead areas -- regions of the virtual screen that are inaccessible due to display devices with different resolutions. For example: "1600x1200, 1024x768" produces an inaccessible region below the 1024x768 display. Specifying a panning domain for the second display device: "1600x1200, 1024x768 @1024x1200" provides access to that dead area by allowing you to pan the 1024x768 viewport up and down in the 1024x1200 panning domain. Offsets can be used in conjunction with panning domains to position the panning domains in the virtual screen space (note that the offset describes the panning domain, and only affects the viewport in that the viewport must be contained within the panning domain). For example, the following describes two modes, each with a panning domain width of 1900 pixels, and the second display is positioned below the first: "1600x1200 @1900x1200 +0+0, 1024x768 @1900x768 +0+1200" If no MetaMode string is specified, then the X driver uses the modes listed in the relevant "Display" subsection, attempting to place matching modes on each display device. o TwinViewOrientation This option controls the positioning of the second display device relative to the first within the virtual X screen, when offsets are not explicitly given in the MetaModes. The possible values are: "RightOf" (the default) "LeftOf" "Above" "Below" "Clone" When "Clone" is specified, both display devices will be assigned an offset of 0,0. o ConnectedMonitor With this option you can override what the NVIDIA kernel module detects is connected to your video card. This may be useful, for example, if any of your display devices do not support detection using Display Data Channel (DDC) protocols. Valid values for this option are "CRT" (cathode ray tube), "DFP" (digital flat panel), or "TV" (television); when using TwinView, this option may be a comma-separated list of display devices; e.g.: "CRT, CRT" or "CRT, DFP". Just as in all XF86Config entries, spaces are ignored and all entries are case insensitive. FREQUENTLY ASKED TWINVIEW QUESTIONS: Q: Nothing gets displayed on my second monitor; what is wrong? A: Monitors that do not support monitor detection using Display Data Channel (DDC) protocols (this includes most older monitors) are not detectable by your NVIDIA card. You need to explicitly tell the NVIDIA XFree86 driver what you have connected using the "ConnectedMonitor" option; e.g.: Option "ConnectedMonitor" "CRT, CRT" Q: Will window managers be able to appropriately place windows (e.g. avoiding placing windows across both display devices, or in inaccessible regions of the virtual desktop)? A: Yes. The NVIDIA X driver provides a Xinerama extension that X clients (such as window managers) can use to discover the current TwinView configuration. Note that the Xinerama protocol provides no way to inform clients of when a configuration change occurs. So, if you modeswitch to a different MetaMode, your window manager will still think you have the previous configuration. Using the Xinerama extension, in conjunction with the XF86VidMode extension to get modeswitch events, window managers should be able to determine the TwinView configuration at any given time. Unfortunately, the data provided by XineramaQueryScreens() appears to confuse some window managers; to workaround such broken window mangers, you can disable communication of the TwinView screen layout with the "NoTwinViewXineramaInfo" XF86Config Option (please see Appendix D for details). Be aware that the NVIDIA driver cannot provide the Xinerama extension if XFree86's own Xinerama extension is being used. Explicitly specifying Xinerama in the XF86Config file or on the XFree86 commandline will prohibit NVIDIA's Xinerama extension from installing, so make sure that XFree86's /var/log/XFree86.0.log is not reporting: (++) Xinerama: enabled if you wish the NVIDIA driver to be able to provide the Xinerama extension while in TwinView. Another solution is to use panning domains to eliminate inaccessible regions of the virtual screen (see the MetaMode description above). A third solution is to use two separate X screens, rather than use TwinView. Please see (app-r) APPENDIX R: CONFIGURING MULTIPLE X SCREENS ON ONE CARD. Q: Why can I not get a resolution of 1600x1200 on the second display device when using a GeForce2 MX? A: Because the second display device on the GeForce2 MX was designed to be a digital flat panel, the Pixel Clock for the second display device is only 150 MHz. This effectively limits the resolution on the second display device to somewhere around 1280x1024 (for a description of how Pixel Clock frequencies limit the programmable modes, see the XFree86 Video Timings HOWTO). This constraint is not present on GeForce4 or GeForce FX chips -- the maximum pixel clock is the same i on both heads. Q: Do video overlays work across both display devices? A: Hardware video overlays only work on the first display device. The current solution is that blitted video is used instead on TwinView. Q: How are virtual screen dimensions determined in TwinView? A: After all requested modes have been validated, and the offsets for each MetaMode's viewports have been computed, the NVIDIA driver computes the bounding box of the panning domains for each MetaMode. The maximum bounding box width and height is then found. Note that one side effect of this is that the virtual width and virtual height may come from different MetaModes. Given the following MetaMode string: "1600x1200,NULL; 1024x768+0+0, 1024x768+0+768" the resulting virtual screen size will be 1600 x 1536. Q: Can I play full screen games across both display devices? A: Yes. While the details of configuration will vary from game to game, the basic idea is that a MetaMode presents X with a mode whose resolution is the bounding box of the viewports for that MetaMode. For example, the following: Option "MetaModes" "1024x768,1024x768; 800x600,800x600" Option "TwinViewOrientation" "RightOf" produce two modes: one whose resolution is 2048x768, and another whose resolution is 1600x600. Games such as Quake 3 Arena use the VidMode extension to discover the resolutions of the modes currently available. To configure Quake 3 Arena to use the above MetaMode string, add the following to your q3config.cfg file: seta r_customaspect "1" seta r_customheight "600" seta r_customwidth "1600" seta r_fullscreen "1" seta r_mode "-1" Note that, given the above configuration, there is no mode with a resolution of 800x600 (remember that the MetaMode "800x600, 800x600" has a resolution of 1600x600"), so if you change Quake 3 Arena to use a resolution of 800x600, it will display in the lower left corner of your screen, with the rest of the screen grayed out. To have single head modes available as well, an appropriate MetaMode string might be something like: "800x600,800x600; 1024x768,NULL; 800x600,NULL; 640x480,NULL" More precise configuration information for specific games is beyond the scope of this document, but the above examples coupled with numerous online sources should be enough to point you in the right direction. __________________________________________________________________________ (app-j) APPENDIX J: CONFIGURING TV-OUT __________________________________________________________________________ NVIDIA GPU-based video cards with a TV-Out (S-Video) connector can be employed to use a television as another display device, just like a CRT or digital flat panel. The TV can be used by itself, or (on appropriate video cards) in conjunction with another display device in a TwinView configuration. If a TV is the only display device connected to your video card, it will be used as the primary display when you boot your system (ie the console will come up on the TV just as if it were a CRT). To use your TV with X, there are a few parameters that you should pay special attention to in your XF86Config file: o The VertRefresh and HorizSync values in your monitor section; please make sure these are appropriate for your television. Values are generally: HorizSync 30-50 VertRefresh 60 o The Modes in your screen section; the valid modes for your TV encoder will be reported in a verbose XFree86.0.log file (generated with `startx -- -logverbose 5`) when X is run on a TV. Some modes may be limited to certain TV Standards; if that is the case, it will be noted in the XFree86.0.log file. Generally, atleast 800x600 and 640x480 are supported. o The "TVStandard" option should be added to your screen section; valid values are: "PAL-B" : used in Belgium, Denmark, Finland, Germany, Guinea, Hong Kong, India, Indonesia, Italy, Malaysia, The Netherlands, Norway, Portugal, Singapore, Spain, Sweden, and Switzerland "PAL-D" : used in China and North Korea "PAL-G" : used in Denmark, Finland, Germany, Italy, Malaysia, The Netherlands, Norway, Portugal, Spain, Sweden, and Switzerland "PAL-H" : used in Belgium "PAL-I" : used in Hong Kong and The United Kingdom "PAL-K1" : used in Guinea "PAL-M" : used in Brazil "PAL-N" : used in France, Paraguay, and Uruguay "PAL-NC" : used in Argentina "NTSC-J" : used in Japan "NTSC-M" : used in Canada, Chile, Colombia, Costa Rica, Ecuador, Haiti, Honduras, Mexico, Panama, Puerto Rico, South Korea, Taiwan, United States of America, and Venezuela The line in your XF86Config file should be something like: Option "TVStandard" "NTSC-M" If you do not specify a TVStandard, or you specify an invalid value, the default "NTSC-M" will be used. Note: if your country is not in the above list, select the country closest to your location. o The "ConnectedMonitor" option can be used to tell X to use the TV for display. This should only be needed if your TV is not detected by the video card, or you use a CRT (or digital flat panel) as your boot display, but want to redirect X to use the TV. The line in your config file should be: Option "ConnectedMonitor" "TV" o The "TVOutFormat" option can be used to force SVIDEO or COMPOSITE output. Without this option the driver autodetects the output format. Unfortunately, it does not always do this correctly. The output format can be forced with the options: Option "TVOutFormat" "SVIDEO" or Option "TVOutFormat" "COMPOSITE" o The "TVOverScan" option can be used to enable Overscan where supported. Valid values are decimal values in the range 1.0 (which means overscan as much as possible: make the image as large as possible) and 0.0 (which means disable overscanning: make the image as small as possible). Overscanning is disabled (0.0) by default. Overscan is currently only available on GeForce4 or newer GPUs with either NVIDIA or Conexant TV encoders. The NVIDIA XFree86 driver may not restore the console correctly with XFree86 versions older than 4.3 when the console is a TV. This is due to binary incompatibilities between XFree86 int10 modules. If you use a TV as your console it is recommended that you upgrade to XFree86 4.3. __________________________________________________________________________ (app-k) APPENDIX K: CONFIGURING A LAPTOP __________________________________________________________________________ INSTALLATION AND CONFIGURATION Installation and configuration of the NVIDIA Accelerated Linux Driver Set on a laptop is the same as for any desktop environment, with a few minor exceptions, listed below. Starting in the 1.0-2802 release, information about the internal flatpanel for use in initializing the display is by default generated on the fly from data stored in the video BIOS. This can be disabled by setting the "SoftEDIDs" kernel option to 0. If "SoftEDIDs" is turned off, then hardcoded data will be chosen from a table, based on the value of the "Mobile" kernel option. The "Mobile" kernel option can be set to any of the following values: 0xFFFFFFFF : let the kernel module auto detect the correct value 1 : Dell laptops 2 : non-Compal Toshiba laptops 3 : all other laptops 4 : Compal Toshiba laptops 5 : Gateway laptops Again, the "Mobile" kernel option is only needed if SoftEDIDs is disabled; when it is used, it is usually safest to let the kernel module auto detect the correct value (this is the default behavior). Should you need to alter either of these options, this can be done by doing any of the following: o editing os-registry.c in the usr/src/nv/ directory of the .run file. o setting the value on the modprobe command line (eg: `modprobe nvidia NVreg_SoftEDIDs=0 NVreg_Mobile=3`) o adding an "options" line to your module configuration file, usually /etc/modules.conf (eg: "options nvidia NVreg_Mobile=5") ADDITIONAL FUNCTIONALITY TWINVIEW All mobile NVIDIA chips support TwinView. TwinView on a laptop can be configured in the same way as on a desktop machine (please refer to APPENDIX I above); note that in a TwinView configuration using the laptop's internal flat panel and an external CRT, the CRT is the primary display device (specify it's HorizSync and VertRefresh in the Monitor section of your XF86Config file) and the flat panel is the secondary display device (specify it's HorizSync and VertRefresh through the SecondMonitorHorizSync and SecondMonitorVertRefresh options). You can also employ the UseEdidFreqs option to acquire the HorizSync and VertRefresh from the EDID of each display devices, and not worry about setting them in your XF86Config file (this should only be done if you trust your display device's reported EDIDs -- please see the description of the UseEdidFreqs option in APPENDIX D for details). HOTKEY SWITCHING OF DISPLAY DEVICES Besides TwinView, mobile NVIDIA chips also have the capacity to react to an LCD/CRT hotkey event, toggling between each of the connected display devices and each possible combination of the connected display devices (note that only 2 display devices may be active at a time). TwinView as configured in your XF86Config file and hotkey functionality are mutually exclusive -- if you enable TwinView in your XF86Config file, then the NVIDIA X driver will ignore LCD/CRT hotkey events. Another important aspect of hotkey functionality is that you can dynamically connect and remove display devices to/from your laptop and hotkey to them without restarting X. A concern with all of this is how to validate and determine what modes should be programmed on each display device. First, it is immensely helpful to use the UseEdidFreqs so that the hsync and vrefresh for each display device can be retrieved from the display devices' EDID -- otherwise, the semantics of what the contents of the monitor section mean constantly changes with each hotkey event. When X is started, or when a change is detected in the list of connected display devices, a new hotkey sequence list is constructed -- this lists what display devices will be used with each hotkey event. When a hotkey event occurs, then the next hotkey state in the sequence is chosen. Each mode requested in the XF86Config file is validated against each display device's constraints, and the resulting modes are made available for that display device. If multiple display devices are to be active at once, then the modes from each display device are paired together; if an exact match (same resolution) cannot be found, then the closest fit is found, and the display device with the smaller resolution is panned within the resolution of the other display device. When vt-switching away from X, the vga console will always be restored on the display device on which it was present when X was started. Similarly, when vt-switching back into X, the same display device configuration will be used as when you vt-switched away from X, regardless of what LCD/CRT hotkey activity occurred while vt-switched away. NON-STANDARD MODES ON LCD DISPLAYS Some users have had difficulty programming a 1400x1050 mode (the native resolution of some laptop LCDs). In version 4.0.3, XFree86 added several 1400x1050 modes to its database of default modes, but if you are using an older version of XFree86, here is a modeline that you can use: # -- 1400x1050 -- # 1400x1050 @ 60Hz, 65.8 kHz hsync Modeline "1400x1050" 129 1400 1464 1656 1960 1050 1051 1054 1100 +HSync +VSync KNOWN LAPTOP ISSUES o LCD/CRT hotkey switching is not currently functioning on any Toshiba laptop, with the exception of the Toshiba Satellite 3000 series. o TwinView on Satellite 2800 series Toshbia laptops is not currently functioning. o The video overlay only works on the first display device on which you started X. For example, if you start X on the internal LCD, run a video application that uses the video overlay (uses the "Video Overlay" adaptor advertised through the XV extension), and then hotkey switch to add a second display device, the video will not appear on the second display device. To work around this, you can either configure the video application to use the "Video Blitter" adaptor advertised through the XV extension (this is always available), or hotkey switch to the display device on which you want to use the video overlay *before* starting X. __________________________________________________________________________ (app-l) APPENDIX L: PROGRAMMING MODES __________________________________________________________________________ The NVIDIA Accelerated Linux Driver Set supports all standard VGA and VESA modes, as well as most user-written custom mode lines; double-scan modes are supported on all hardware. In general, your display device (monitor/flat panel/television) will be a greater constraint on what modes you can use than either your NVIDIA GPU-based video board or the NVIDIA Accelerated Linux Driver Set. To request one or more standard modes for use in X, you can simply add a "Modes" line such as: Modes "1600x1200" "1024x768" "640x480" in the appropriate Display subsection of your XF86Config file (please see the XF86Config(4/5) man page for details). The following documentation is primarily of interest if you compose your own custom mode lines, experiment with xvidtune(1), or are just interested in learning more. Please note that this is neither an explanation nor a guide to the fine art of crafting custom mode lines for XFree86. We leave that, rather, to documents such as the XFree86 Video Timings HOWTO (which can be found at www.tldp.org). DEPTH, BITS PER PIXEL, AND PITCH While not directly a concern when programming modes, the bits used per pixel is an issue when considering the maximum programmable resolution; for this reason, it is worthwhile to address the confusion surrounding the terms "depth" and "bits per pixel". Depth is how many bits of data are stored per pixel. Supported depths are 8, 15, 16, and 24. Most video hardware, however, stores pixel data in sizes of 8, 16, or 32 bits; this is the amount of memory allocated per pixel. When you specify your depth, X selects the bits per pixel (bpp) size in which to store the data. Below is a table of what bpp is used for each possible depth: depth bpp ===== ===== 8 8 15 16 16 16 24 32 Lastly, the "pitch" is how many bytes in the linear frame buffer there are between one pixel's data, and the data of the pixel immediately below. You can think of this as the horizontal resolution multiplied by the bytes per pixel (bits per pixel divided by 8). In practice, the pitch may be more than this product due to alignment constraints. MAXIMUM RESOLUTIONS The NVIDIA Accelerated Linux Driver Set and NVIDIA GPU-based video boards support resolutions up to 2048x1536, though the maximum resolution your system can support is also limited by the amount of video memory (see USEFUL FORMULAS for details) and the maximum supported resolution of your display device (monitor/flat panel/television). Also note that while use of a video overlay does not limit the maximum resolution or refresh rate, video memory bandwidth used by a programmed mode does effect the overlay quality. USEFUL FORMULAS The maximum resolution is a function both of the amount of video memory and the bits per pixel you elect to use: HR * VR * (bpp/8) = Video Memory Used In other words, the amount of video memory used is equal to the horizontal resolution (HR) multiplied by the vertical resolution (VR) multiplied by the bytes per pixel (bits per pixel divided by eight). Technically, the video memory used is actually the pitch times the vertical resolution, and the pitch may be slightly greater than (HR * (bpp/8)) to accommodate hardware requirements that the pitch be a multiple of some value. Please note that this is just memory usage for the frame buffer; video memory is also used by other things such as OpenGL or pixmap caching. Another important relationship is that between the resolution, the pixel clock (aka dot clock) and the vertical refresh rate: RR = PCLK / (HFL * VFL) In other words, the refresh rate (RR) is equal to the pixel clock (PCLK) divided by the total number of pixels: the horizontal frame length (HFL) multiplied by the vertical frame length (VFL) (note that these are the frame lengths, and not just the visible resolutions). As described in the XFree86 Video Timings HOWTO, the above formula can be rewritten as: PCLK = RR * HFL * VFL Given a maximum pixel clock, you can adjust the RR, HFL and VFL as desired, as long as the product of the three is consistent. The pixel clock is reported in the log file when you run X with verbose logging: `startx -- -logverbose 5`. Your XFree86.0.log should contain several lines like: (--) NVIDIA(0): Display Device 0: maximum pixel clock at 8 bpp: 350 MHz (--) NVIDIA(0): Display Device 0: maximum pixel clock at 16 bpp: 350 MHz (--) NVIDIA(0): Display Device 0: maximum pixel clock at 32 bpp: 300 MHz which indicate the maximum pixel clock at each bit per pixel size. HOW MODES ARE VALIDATED During the PreInit phase of the X server, the NVIDIA X driver validates all requested modes by doing the following: o Take the intersection of the HorizSync and VertRefresh ranges given by the user in the XF86Config with the ranges reported by the monitor in the EDID (Extended Display Identification Data); this behavior can be disabled by using the "IgnoreEDID" option in which case the X driver will blindly accept the HorizSync and VertRefresh ranges given by the user. o Call the xf86ValidateModes() helper function, which finds modes with the names the user specified in the XF86Config file, pruning out modes with invalid horizontal sync frequencies or vertical refresh rates, pixel clocks larger than the maximum pixel clock for the video card, or resolutions larger than the virtual screen size (if a virtual screen size was specified in the XF86Config file). Several other constraints are applied; see xc/programs/Xserver/hw/xfree86/common/xf86Mode.c:xf86ValidateModes(). o All modes returned from xf86ValidateModes() are then examined to make sure their resolutions are not larger than the largest mode reported by the monitor's EDID (this can be disabled with the "IgnoreEDID" option. If the display is a TV, each mode is checked to make sure it has a resolution that is supported by the TV encoder (usually only 800x600 and 640x480 are supported by the encoder). o All modes are also tested to confirm that they fit within the hardware's memory bandwidth constraints. This test can be disabled with the NoBandWidthTest XF86Config file option. o All remaining modes are then checked to make sure they pass the constraints described below in ADDITIONAL MODE CONSTRAINTS. The last three steps are also done when each mode is programmed, to catch potentially invalid modes submitted by the XF86VidModeExtension (eg xvidtune(1)). For TwinView, the above validation is done for the modes requested for each display device. ADDITIONAL MODE CONSTRAINTS Below is a list of additional constraints on a mode's parameters that must be met. In some cases these are specific to particular chips. o The horizontal resolution (HR) must be a multiple of 8 and be less than or equal to the value in the table below. o The horizontal blanking width (the maximum of the horizontal frame length and the horizontal sync end minus the minimum of the horizontal resolution and the horizontal sync start (max(HFL,HSE) - min(HR,HSS)) must be a multiple of 8 and be less than or equal to the value in the table below. o The horizontal sync start (HSS) must be a multiple of 8 and be less than or equal to the value in the table below. o The horizontal sync width (the horizontal sync end minus the horizontal sync start (HSE - HSS)) must be a multiple of 8 and be less than or equal to the value in the table below. o The horizontal frame length (HFL) must be a multiple of 8, must be greater than or equal to 40, and must be less than or equal to the value in the table below. o The vertical resolution (VR) must be less than or equal to the value in the table below. o The vertical blanking width (the maximum of the vertical frame length and the vertical sync end minus the minimum of the vertical resolution and the vertical sync start (max(VFL,VSE) - min(VR,VSS)) must be less than or equal to the value in the table below. o The vertical sync start (VSS) must be less than or equal to the value in the table below. o The vertical sync width (the vertical sync end minus the vertical sync start (VSE - VSS)) must be less than or equal to the value in the table below. o The vertical frame length (VFL) must be greater than or equal to 2 and less than or equal to the value in the table below. Maximum DAC Values ------------------ | GeForce/TNT Geforce2 & 3 Geforce4 or newer ______|_______________________________________________ | HR | 4096 4096 8192 HBW | 1016 1016 2040 HSS | 4088 4088 8224 HSW | 256 256 512 HFL | 4128 4128 8224 VR | 2048 4096 8192 VBW | 128 128 256 VSS | 2047 4095 8192 VSW | 16 16 16 VFL | 2049 4097 8192 Here is an example mode line demonstrating the use of each abbreviation used above: # Custom Mode line for the SGI 1600SW Flatpanel # name PCLK HR HSS HSE HFL VR VSS VSE VFL Modeline "sgi1600x1024" 106.9 1600 1632 1656 1672 1024 1027 1030 1067 ENSURING IDENTICAL MODETIMINGS Some functionality, such as Active Stereo with TwinView, requires control over exactly what mode timings are used. There are several ways to accomplish that: o If you only want to make sure that both display devices use the same modes, you only need to make sure that both display devices use the same HorizSync and VertRefresh values when performing mode validation; this would be done by making sure the HorizSync and SecondMonitorHorizSync match, and that the VertRefresh and the SecondMonitorVertRefresh match. o A more explicit approach is to specify the modeline you wish to use (using one of the modeline generators available), and using a unique name. For example, if you wanted to use 1024x768 at 120 Hz on each monitor in TwinView with active stereo, you might add something like: # 1024x768 @ 120.00 Hz (GTF) hsync: 98.76 kHz; pclk: 139.05 MHz Modeline "1024x768_120" 139.05 1024 1104 1216 1408 768 769 772 823 -HSync +Vsync In the monitor section of your XF86Config file, and then in the Screen section of your XF86Config file, specify a MetaMode like this: Option "MetaModes" "1024x768_120, 1024x768_120" SEE ALSO: An XFree86 modeline generator, conforming to the GTF Standard is available here: http://gtf.sourceforge.net/ For additional modeline generators, try searching for "modeline" on freshmeat.net. __________________________________________________________________________ (app-m) APPENDIX M: FLIPPING AND UBB __________________________________________________________________________ The NVIDIA Accelerated Linux Driver Set supports Unified Back Buffer (UBB) and OpenGL Flipping. These features can provide performance gains in certain situtations. o Unified Back Buffer (UBB): UBB is available only on the Quadro family of GPUs (Quadro4 NVS excluded) and is enabled by default when there is sufficient video memory available. This can be disabled with the UBB XF86Config option described in Appendix D. When UBB is enabled, all windows share the same back, stencil and depth buffer. When there are many windows, the back, stencil and depth usage will never exceed the size of that used by a full screen window. However, even for a single small window the back, stencil and depth the video memory usage is that of a full screen window. In that case video memory may be used less efficiently than in the non-UBB case. o Flipping: when OpenGL flipping is enabled, OpenGL can perform buffer swaps by changing which buffer the DAC scans out rather than copying the back buffer contents to the front buffer; this is generally a much higher performance mechanism and allows tearless swapping during the vertical retrace (when __GL_SYNC_TO_VBLANK is set). The conditions under which OpenGL can flip are slightly complicated, but in general: on Geforce or newer hardware, OpenGL can flip when a single full screen unobscured OpenGL application is running, and __GL_SYNC_TO_VBLANK is enabled. Additionally, OpenGL can flip on Quadro hardware even when an OpenGL window is partially obscured or not full screen or __GL_SYNC_TO_VBLANK is not enabled. __________________________________________________________________________ (app-n) APPENDIX N: KNOWN ISSUES __________________________________________________________________________ The following problems still exist in this release and are in the process of being resolved. o OpenGL + Xinerama Currently, OpenGL will not display to anything other than the first head in a Xinerama environment. o OpenGL and dlopen() There are some issues with older versions of the glibc dynamic loader (e.g., the version that shipped with Red Hat Linux 7.2) and applications such as Quake3 and Radiant, that use dlopen(). See the FREQUENTLY ASKED QUESTIONS section for more details. o DPMS and TwinView DPMS Modes "suspend" and "standby" do not work correctly on a second CRT when using TwinView. The screen becomes blank instead of the monitor being set to the requested DPMS state. o DPMS and Flat Panel DPMS modes "suspend" and "standby" do not work correctly on a flat panel display. The screen becomes blank instead of the flat panel being set to the requested DPMS state. o Multicard, Multimonitor In some cases, the secondary card is not initialized correctly by the NVIDIA kernel module. You can work around this by enabling the XFree86 Int10 module to soft-boot all secondary cards. See "APPENDIX D: XF86CONFIG OPTIONS" for details. o Laptop If you are using a laptop please see the "Known Laptop Issues" in APPENDIX D. o FSAA When FSAA is enabled (the __GL_FSAA_MODE environment variable is set to a value that enables FSAA and a multisample visual is chosen), the rendering may be corrupted when resizing the window. o Interaction with pthreads Single threaded applications that dlopen() NVIDIA's libGL library, and then dlopen() any other library that is linked against pthreads will crash in NVIDIA's libGL library. This does not happen in NVIDIA's new ELF TLS OpenGL libraries (please see (app-c) APPENDIX C: INSTALLED COMPONENTS for a description of the ELF TLS OpenGL libraries). Possible work arounds for this problem are: 1) Load the library that is linked with pthreads before loading libGL.so. 2) Link the application with pthreads. HARDWARE ISSUES This section describes problems that will not be fixed. Usually, the source of the problem is beyond the control of NVIDIA. Following is the list of problems: o Gigabyte GA-6BX Motherboard This motherboard uses a LinFinity regulator on the 3.3-V rail that is rated to only 5 A -- less than the AGP specification, which requires 6 A. When diagnostics or applications are running, the temperature of the regulator rises, causing the voltage to the NVIDIA chip to drop as low as 2.2 V. Under these circumstances, the regulator cannot supply the current on the 3.3-V rail that the NVIDIA chip requires. This problem does not occur when the graphics board has a switching regulator or when an external power supply is connected to the 3.3-V rail. o VIA KX133 and 694X Chip sets with AGP 2x On Athlon motherboards with the VIA KX133 or 694X chip set, such as the ASUS K7V motherboard, NVIDIA drivers default to AGP 2x mode to work around insufficient drive strength on one of the signals. o Irongate Chip sets with AGP 1x AGP 1x transfers are used on Athlon motherboards with the Irongate chip set to work around a problem with the signal integrity of the chip set. o ALi chipsets, ALi1541 and ALi1647 On ALi1541 and ALi1647 chipsets, NVIDIA drivers disable AGP to work around timing issues and signal integrity issues. See "APPENDIX G: ALI SPECIFIC ISSUES" for more information on ALi chipsets. o I/O APIC (SMP) If you are experiencing stability problems with a Linux SMP machine and seeing I/O APIC warning messages from the Linux kernel, system reliability may be greatly improved by setting the "noapic" kernel parameter. o Local APIC (UP) On some systems, setting the "Local APIC Support on Uniprocessors" kernel configuration option can have adverse effects on system stability and performance. If you are experiencing lockups with a Linux UP machine and have this option set, try disabling local APIC support. __________________________________________________________________________ (app-o) APPENDIX O: PROC INTERFACE __________________________________________________________________________ You can use the /proc filesystem interface to obtain run-time information about the driver, any installed NVIDIA graphics cards, and the AGP status. This information is contained by several files in /proc/driver/nvidia: o /proc/driver/nvidia/version Lists the installed driver revision and the version of the GNU C compiler used to build the Linux kernel module. o /proc/driver/nvidia/cards/0...3 Provides information about each of the installed NVIDIA graphics adapters (model name, IRQ, BIOS version, Bus Type). Please note that the BIOS version is only available while X is running. o /proc/driver/nvidia/agp/card Information about the installed AGP card's AGP capabilities. o /proc/driver/nvidia/agp/host-bridge Information about the host bridge (model and AGP capabilities). o /proc/driver/nvidia/agp/status The current AGP status. If AGP support has been enabled on your system, the AGP driver being used, the AGP rate and information about the status of AGP Fast Writes and Side Band Addressing is shown. The AGP driver is either one of NVIDIA (NVIDIA's built-in AGP driver) or AGPGART (the Linux kernel's agpgart.o driver). If you see "inactive" next to AGPGART, then this means that the AGP chipset was programmed by AGPGART, but is not currently in use. SBA and Fast Writes indicate whether either one of the features is currently in use. Please note that several factors decide if support for either will be enabled. First of all, both the AGP card and the host bridge must support the feature. Even if both do support it, the driver may decide not to use it in favor of system stability. This is particularly true of AGP Fast Writes. __________________________________________________________________________ (app-p) APPENDIX P: XVMC SUPPORT __________________________________________________________________________ This release includes support for the X-Video Motion Compensation (XvMC) version 1.0 API on GeForce4 and GeForce FX products only. There is a static library "libXvMCNVIDIA.a" and a dynamic one "libXvMCNVIDIA_dynamic.so" which is suitable for dlopening. GeForce4 MX and GeForce FX products support both XvMC's "IDCT" and "motion-compensation" levels of acceleration. GeForce4 Ti products only support the motion-compensation level. AI44 and IA44 subpictures are supported. 4:2:0 Surfaces up to 2032x2032 are supported. libXvMCNVIDIA observes the XVMC_DEBUG environment variable and will provide some debug output to stderr when set to an appropriate integer value. '0' disables debug output. '1' enables debug output for failure conditions. '2' or higher enables output of warning messages. __________________________________________________________________________ (app-q) APPENDIX Q: GLX SUPPORT __________________________________________________________________________ This release supports GLX 1.3 with the following extensions: GLX_EXT_visual_info GLX_EXT_visual_rating GLX_SGIX_fbconfig GLX_SGIX_pbuffer GLX_ARB_get_proc_address For a description of these extensions, please see the OpenGL extension registry at http://oss.sgi.com/projects/ogl-sample/registry/index.html Some of the above extensions exist as part of core GLX 1.3 functionality, however, they are also exported as extensions for backwards compatibility. __________________________________________________________________________ (app-r) APPENDIX R: CONFIGURING MULTIPLE X SCREENS ON ONE CARD __________________________________________________________________________ Graphics chips that support TwinView (see (app-i) APPENDIX I: CONFIGURING TWINVIEW) can also be configured to treat each connected display device as a separate X screen. While there are several disadvantages to this approach as compared to TwinView (eg: windows cannot be dragged between X screens, hardware accelerated OpenGL cannot span the two X screens), it does offer several advantages over TwinView: o If each display device is a separate X screen, then properties that may vary between X screens may vary between displays (eg: depth, root window size, etc). o Hardware that can only be used on one display at a time (eg: video overlays, hardware accelerated RGB overlays), and which consequently cannot be used at all when in TwinView, can be exposed on the first X screen when each display is a separate X screen. o The 1-to-1 association of display devices to X screens is more historically in line with X. To configure two separate X screens to share one graphics chip, here is what you will need to do: First, create two separate Device sections, each listing the BusID of the graphics card to be shared, each listing the driver as "nvidia", and assign each a separate screen: Section "Device" Identifier "nvidia0" Driver "nvidia" # Edit the BusID with the location of your graphics card BusID "PCI:2:0:0" Screen 0 EndSection Section "Device" Identifier "nvidia1" Driver "nvidia" # Edit the BusID with the location of your graphics card BusId "PCI:2:0:0" Screen 1 EndSection Then, create two Screen sections, each using one of the Device sections: Section "Screen" Identifier "Screen0" Device "nvidia0" Monitor "Monitor0" DefaultDepth 24 Subsection "Display" Depth 24 Modes "1600x1200" "1024x768" "800x600" "640x480" EndSubsection EndSection Section "Screen" Identifier "Screen1" Device "nvidia1" Monitor "Monitor1" DefaultDepth 24 Subsection "Display" Depth 24 Modes "1600x1200" "1024x768" "800x600" "640x480" EndSubsection EndSection (note: you'll also need to create a second Monitor section) Finally, update the ServerLayout section to use and position both Screen sections: Section "ServerLayout" ... Screen 0 "Screen0" Screen 1 "Screen1" leftOf "Screen0" ... EndSection For further details, please refer to the XF86Config manpage. __________________________________________________________________________ (app-s) APPENDIX S: POWER MANAGEMENT SUPPORT __________________________________________________________________________ This release includes support for APM based power management. This means that our driver will support suspend and resume, but will not support standby. Your laptop's system bios will need to support APM, rather than ACPI. Many, but not all, of the GeForce2 and GeForce4 based laptops include APM support. You can check for APM support via the procfs interface (check for the existance of /proc/apm) or via the kernel's boot output: % dmesg | grep -i apm a message similar to this indicates apm support: apm: BIOS version 1.2 Flags 0x03 (Driver version 1.16) or a message like this indicates no apm support: No APM support in Kernel Although ACPI support is advancing in development kernels and some backported patches for 2.4 kernels exist, the NVIDIA graphics driver does not yet provide support for ACPI. We hope to finish this support in the near future. Note that standby is not supported, but that the kernel will attempt to enter standby if told to do so. When changing power levels, many system services are alerted of the change so that they can handle the change appropriately. For example, networking will be disabled before suspending, then reenabled when resuming. When the kernel attempts to enter standby, the bios will fail the attempt. The kernel will print out the error message "standby: Parameter out of range", but will fail to notify the system services of the failure. As a result, the system will not go into suspension, but all system services will be disabled and the system will appear hung. The best way to recover from this situation is to enter suspend, then resume. Some laptops have experienced agp bus corruption when resuming from suspend that leads to a system hang. Disabling AGP will work around this problem (please see APPENDIX F: CONFIGURING AGP for more details on disabling agp).