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<h2 class="title"><a name="installedcomponents" id=
"installedcomponents"></a>Chapter 5. Listing of Installed
Components</h2>
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<p>The NVIDIA Accelerated Linux Graphics Driver consists of the
following components (filenames in parenthesis are the full names
of the components after installation; "x.y.z" denotes the current
version. In these cases appropriate symlinks are created during
installation):</p>
<div class="itemizedlist">
<ul type="disc">
<li>
<p>An X driver (/usr/X11R6/lib/modules/drivers/nvidia_drv.so); this
driver is needed by the X server to use your NVIDIA hardware.</p>
</li>
<li>
<p>A GLX extension module for X
(/usr/X11R6/lib/modules/extensions/libglx.so.x.y.z); this module is
used by the X server to provide server-side GLX support.</p>
</li>
<li>
<p>An X module for wrapped software rendering
(/usr/X11R6/lib/modules/libnvidia-wfb.so.x.y.z and optionally,
/usr/X11R6/lib/modules/libwfb.so); this module is used by the X
driver to perform software rendering on GeForce 8 series GPUs. If
libwfb.so already exists, nvidia-installer will not overwrite it.
Otherwise, it will create a symbolic link from libwfb.so to
libnvidia-wfb.so.x.y.z.</p>
</li>
<li>
<p>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.</p>
</li>
<li>
<p>An OpenGL core library (/usr/lib/libnvidia-glcore.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 X config file -- that is taken care of by
libglx.</p>
</li>
<li>
<p>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); see <a href=
"xvmcsupport.html" title=
"Appendix G. XvMC Support">Appendix G, <i>XvMC
Support</i></a> for details.</p>
</li>
<li>
<p>Three VDPAU (Video Decode and Presentation API for Unix-like
systems) libraries: The top-level wrapper
(/usr/X11R6/lib/libvdpau.so.x.y.z), a debug trace library
(/usr/X11R6/lib/libvdpau_trace.so.x.y.z), and the NVIDIA
implementation (/usr/X11R6/lib/libvdpau_nvidia.so.x.y.z). See
<a href="vdpausupport.html" title=
"Appendix H. VDPAU Support">Appendix H, <i>VDPAU
Support</i></a> for details.</p>
</li>
<li>
<p>Two CUDA libraries (/usr/lib/libcuda.so.x.y.z,
/usr/lib/libcuda.la); these libraries provide runtime support for
CUDA (high-performance computing on the GPU) applications.</p>
</li>
<li>
<p>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 X 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 the X server, 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.</p>
</li>
<li>
<p>The nvidia-tls libraries (/usr/lib/libnvidia-tls.so.x.y.z and
/usr/lib/tls/libnvidia-tls.so.x.y.z); these files provide thread
local storage support for the NVIDIA OpenGL libraries (libGL,
libnvidia-glcore, and libglx). Each nvidia-tls library provides
support for a particular thread local storage model (such as ELF
TLS), and the one appropriate for your system will be loaded at run
time.</p>
</li>
<li>
<p>The application nvidia-installer (/usr/bin/nvidia-installer) is
NVIDIA's tool for installing and updating NVIDIA drivers. See
<a href="installdriver.html" title=
"Chapter 4. Installing the NVIDIA Driver">Chapter 4,
<i>Installing the NVIDIA Driver</i></a> for a more thorough
description.</p>
</li>
<li>
<p>The application nvidia-xconfig (/usr/bin/nvidia-xconfig) is
NVIDIA's tool for manipulating X server configuration files. See
<a href="editxconfig.html" title=
"Chapter 6. Configuring X for the NVIDIA Driver">Chapter 6,
<i>Configuring X for the NVIDIA Driver</i></a> for more
information.</p>
</li>
<li>
<p>The application nvidia-settings (/usr/bin/nvidia-settings) is
NVIDIA's tool for dynamic configuration while the X server is
running. See <a href="nvidiasettings.html" title=
"Chapter 24. Using the nvidia-settings Utility">Chapter 24,
<i>Using the nvidia-settings Utility</i></a> for more
information.</p>
</li>
</ul>
</div>
<p></p>
<p>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 Graphics Driver, as well as their symlinks):</p>
<pre class="screen">
/usr/lib/xorg/modules/drivers/nvidia_drv.so
/usr/lib/xorg/modules/libwfb.so (if your X server is new enough), or
/usr/lib/xorg/modules/libnvidia-wfb.so and
/usr/lib/xorg/modules/libwfb.so -> libnvidia-wfb.so
/usr/lib/xorg/modules/extensions/libglx.so.x.y.z
/usr/lib/xorg/modules/extensions/libglx.so -> libglx.so.x.y.z
(the above may also be in /usr/lib/modules or /usr/X11R6/lib/modules)
/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/libnvidia-glcore.so.x.y.z
/usr/lib/libcuda.so.x.y.z
/usr/lib/libcuda.so -> libcuda.so.x.y.z
/lib/modules/`uname -r`/video/nvidia.{o,ko}, or
/lib/modules/`uname -r`/kernel/drivers/video/nvidia.{o,ko}
</pre>
<p>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. An example of a library
that often creates conflicts is "/usr/X11R6/lib/libGL.so*".</p>
<p>If the libraries appear to be correct, then verify that the
application is using the correct libraries. For example, to check
that the application /usr/X11R6/bin/glxgears is using the NVIDIA
libraries, run:</p>
<pre class="screen">
% ldd /usr/X11R6/bin/glxgears
linux-gate.so.1 => (0xffffe000)
libGL.so.1 => /usr/lib/libGL.so.1 (0xb7ed1000)
libXext.so.6 => /usr/X11R6/lib/libXext.so.6 (0xb7ec0000)
libX11.so.6 => /usr/X11R6/lib/libX11.so.6 (0xb7de0000)
libpthread.so.0 => /lib/tls/libpthread.so.0 (0x00946000)
libm.so.6 => /lib/tls/libm.so.6 (0x0075d000)
libc.so.6 => /lib/tls/libc.so.6 (0x00631000)
libnvidia-tls.so.275.09.07 => /usr/lib/tls/libnvidia-tls.so.__DRV_VER__ (0xb7ddd000)
libnvidia-glcore.so.275.09.07 => /usr/lib/libnvidia-glcore.so.__DRV_VER__ (0xb5d1f000)
libdl.so.2 => /lib/libdl.so.2 (0x00782000)
/lib/ld-linux.so.2 (0x00614000)
</pre>
<p>Check the files being used for libGL -- if it is something other
than the NVIDIA library, then you will need to either remove the
library that is getting in the way or adjust your ld search path
using the <code class="envar">LD_LIBRARY_PATH</code> environment
variable. You may want to consult the man pages for
<span><strong class="command">ldconfig</strong></span> and
<span><strong class="command">ldd</strong></span>.</p>
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