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<p>In April 2004 the X.Org Foundation released an X server based on
the XFree86 server. While your release may use the X.Org X server,
rather than XFree86, the differences between the two should have no
impact on NVIDIA Linux users with two exceptions:</p>
<div class="itemizedlist">
<ul type="disc">
<li>
<p>The X.Org configuration file is <code class=
"filename">/etc/X11/xorg.conf</code> while the XFree86
configuration file is <code class=
"filename">/etc/X11/XF86Config</code>. The files use the same
syntax. This document refers to both files as “<span class=
"quote">the X config file</span>”.</p>
</li>
<li>
<p>The X.Org log file is <code class=
"filename">/var/log/Xorg.#.log</code> while the XFree86 log file is
<code class="filename">/var/log/XFree86.#.log</code> (where
<code class="filename">#</code> is the server number -- usually 0).
The format of the log files is nearly identical. This document
refers to both files as “<span class="quote">the X log
file</span>”.</p>
</li>
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<p>In order for any changes to be read into the X server, you must
edit the file used by the server. While it is not unreasonable to
simply edit both files, it is easy to determine the correct file by
searching for the line</p>
<pre class="screen">
(==) Using config file:
</pre>
<p>in the X log file. This line indicates the name of the X config
file in use.</p>
<p>If you do not have a working X config file, there are a few
different ways to obtain one. A sample config file is included both
with the XFree86 distribution and with the NVIDIA driver package
(at <code class="filename">/usr/share/doc/NVIDIA_GLX-1.0/</code>).
Tools for generating a config file (such as <span><strong class=
"command">xf86config</strong></span>) are generally included with
Linux. Additional information on the X config syntax can be found
in the XF86Config manual page (<strong class="userinput"><code>man
XF86Config</code></strong> or <strong class="userinput"><code>man
xorg.conf</code></strong>).</p>
<p>If you have a working X config file for a different driver (such
as the “<span class="quote">nv</span>” or
“<span class="quote">vesa</span>” driver), then simply
edit the file as follows.</p>
<p>Remove the line:</p>
<pre class="screen">
Driver "nv"
(or Driver "vesa")
(or Driver "fbdev")
</pre>
<p>and replace it with the line:</p>
<pre class="screen">
Driver "nvidia"
</pre>
<p>Remove the following lines:</p>
<pre class="screen">
Load "dri"
Load "GLCore"
</pre>
<p>In the <code class="computeroutput">Module</code> section of the
file, add the line (if it does not already exist):</p>
<pre class="screen">
Load "glx"
</pre>
<p>If the X config file does not have a <code class=
"computeroutput">Module</code> section, you can safely skip the
last step if the X server installed on your system is an X.Org X
server or an XFree86 X release version 4.4.0 or greater. If you are
using an older XFree86 X server, add the following to your X config
file:</p>
<pre class="screen">
Section "Module"
Load "extmod"
Load "dbe"
Load "type1"
Load "freetype"
Load "glx"
EndSection
</pre>
<p>There are numerous options that may be added to the X config
file to tune the NVIDIA X driver. See <a href="appendix-b.html"
title="Appendix B. X Config Options">Appendix B,
<i>X Config Options</i></a> for a complete list of these
options.</p>
<p>Once you have completed these edits to the X config file, you
may restart X and begin using the accelerated OpenGL libraries.
After restarting X, any OpenGL application should automatically use
the new NVIDIA libraries. (NOTE: If you encounter any problems, see
<a href="chapter-08.html" title=
"Chapter 8. Common Problems">Chapter 8, <i>Common
Problems</i></a> for common problem diagnoses.)</p>
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