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1 peesh 1.1 <?xml version="1.0" encoding="UTF-8"?>
2 nightmorph 1.45 <!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/dri-howto.xml,v 1.44 2009/11/30 20:19:35 nightmorph Exp $ -->
3 peesh 1.1 <!DOCTYPE guide SYSTEM "/dtd/guide.dtd">
4    
5 nightmorph 1.44 <guide>
6 peesh 1.1 <title>Hardware 3D Acceleration Guide</title>
7 neysx 1.35
8 peesh 1.1 <author title="Author">
9 nightmorph 1.44 <mail link="dberkholz"/>
10 peesh 1.1 </author>
11     <author title="Editor">
12 nightmorph 1.44 <mail link="peesh"/>
13 peesh 1.1 </author>
14 nightmorph 1.37 <author title="Editor">
15 nightmorph 1.44 <mail link="nightmorph"/>
16 nightmorph 1.37 </author>
17 peesh 1.1
18 swift 1.8 <abstract>
19 nightmorph 1.37 This document is a guide to getting 3D acceleration working using the DRM with
20     Xorg in Gentoo Linux.
21 swift 1.8 </abstract>
22 peesh 1.1
23 fox2mike 1.27 <!-- The content of this document is licensed under the CC-BY-SA license -->
24     <!-- See http://creativecommons.org/licenses/by-sa/2.5 -->
25 swift 1.12 <license/>
26    
27 nightmorph 1.45 <version>1.13</version>
28     <date>2009-12-14</date>
29 peesh 1.1
30     <chapter>
31 swift 1.8 <title>Introduction</title>
32     <section>
33     <title>What is hardware 3D acceleration and why do I want it?</title>
34     <body>
35    
36     <p>
37 swift 1.41 With hardware 3D acceleration, three-dimensional rendering uses the graphics
38     processor on your video card instead of taking up valuable CPU resources
39     drawing 3D images. It's also referred to as "hardware acceleration" instead of
40 swift 1.8 "software acceleration" because without this 3D acceleration your CPU is forced
41 swift 1.41 to draw everything itself using the Mesa software rendering libraries, which
42 swift 1.17 takes up quite a bit of processing power. While Xorg typically supports 2D
43 swift 1.41 hardware acceleration, it often lacks hardware 3D acceleration.
44     Three-dimensional hardware acceleration is valuable in situations requiring
45 swift 1.8 rendering of 3D objects such as games, 3D CAD and modeling.
46     </p>
47    
48     </body>
49     </section>
50     <section>
51     <title>How do I get hardware 3D acceleration?</title>
52     <body>
53    
54     <p>
55 nightmorph 1.33 In many cases, both binary and open-source drivers exist. Open-source drivers
56 swift 1.8 are preferable since we're using Linux and open source is one of its underlying
57 nightmorph 1.33 principles. Sometimes, binary drivers are the only option, like with nVidia's
58 nightmorph 1.39 cards. Binary drivers include <c>x11-drivers/nvidia-drivers</c> for nVidia cards
59 nightmorph 1.40 and <c>x11-drivers/ati-drivers</c> for ATI cards.
60 swift 1.8 </p>
61    
62     </body>
63     </section>
64     <section>
65     <title>What is DRI?</title>
66     <body>
67    
68     <p>
69 neysx 1.25 The <uri link="http://dri.freedesktop.org/wiki/">Direct Rendering
70     Infrastructure</uri>, also known as the DRI, is a framework for allowing direct
71     access to graphics hardware in a safe and efficient manner. It includes changes
72     to the X server, to several client libraries and to the kernel. The first major
73     use for the DRI is to create fast OpenGL implementations.
74 swift 1.8 </p>
75    
76     </body>
77     </section>
78     <section>
79 nightmorph 1.37 <title>What is the DRM and how does it relate to regular Xorg?</title>
80 swift 1.8 <body>
81    
82     <p>
83 nightmorph 1.37 The DRM (Direct Rendering Manager) is an <e>enhancement</e> to Xorg that adds 3D
84     acceleration for cards by adding the kernel module necessary for direct
85     rendering.
86 swift 1.8 </p>
87    
88     </body>
89     </section>
90     <section>
91     <title>Purpose</title>
92     <body>
93    
94     <p>
95 neysx 1.25 This guide is for people who can't get direct rendering working with just Xorg.
96 nightmorph 1.37 The DRM works for the following drivers:
97     </p>
98    
99     <ul>
100     <li>3dfx</li>
101 nightmorph 1.43 <li>intel</li>
102 nightmorph 1.37 <li>matrox</li>
103     <li>rage128</li>
104     <li>radeon</li>
105     <li>mach64</li>
106     <li>sis300</li>
107     <li>via</li>
108     </ul>
109    
110     <p>
111     See the <uri link="http://dri.freedesktop.org/">DRI homepage</uri> for more info
112     and documentation.
113 swift 1.8 </p>
114    
115     </body>
116     </section>
117     <section>
118     <title>Feedback</title>
119     <body>
120    
121     <p>
122 swift 1.41 With suggestions, questions, etc., e-mail <mail
123 neysx 1.31 link="dberkholz@gentoo.org">Donnie Berkholz</mail>.
124 swift 1.8 </p>
125    
126     </body>
127     </section>
128 peesh 1.1 </chapter>
129    
130 swift 1.8 <chapter>
131 swift 1.17 <title>Install Xorg and configure your kernel</title>
132 swift 1.8 <section>
133 swift 1.17 <title>Install Xorg</title>
134 swift 1.8 <body>
135 peesh 1.1
136 swift 1.17 <p>
137     Please read our <uri link="/doc/en/xorg-config.xml">Xorg Configuration
138     Guide</uri> to get Xorg up and running.
139     </p>
140 peesh 1.1
141 swift 1.8 </body>
142     </section>
143     <section>
144     <title>Configure your kernel</title>
145     <body>
146    
147     <p>
148     Probe for your chipset and enable just that one.
149     </p>
150 peesh 1.1
151 swift 1.9 <pre caption="Checking your AGP chipset">
152 peesh 1.1 # <i>emerge pciutils; lspci | grep AGP</i>
153     # <i>00:01.0 PCI bridge: Intel Corp. 440BX/ZX/DX - 82443BX/ZX/DX AGP bridge (rev 03)</i>
154 neysx 1.21 <comment>(Your output may not match the above due to different hardware.)</comment>
155 swift 1.8 </pre>
156    
157     <p>
158 swift 1.16 If your chipset is not supported by the kernel you might have some succes by
159     passing <c>agp=try_unsupported</c> as a kernel parameter. This will use Intel's
160     generic routines for AGP support. To add this parameter, edit your bootloader
161     configuration file!
162     </p>
163    
164     <p>
165 nightmorph 1.37 Most, if not all, kernels should have these options. This was configured using a
166     standard <c>gentoo-sources</c> kernel.
167 swift 1.8 </p>
168    
169 swift 1.9 <pre caption="Configuring the kernel">
170 peesh 1.1 # <i>ls -l /usr/src/linux </i>
171 nightmorph 1.37 lrwxrwxrwx 1 root root 22 2007-02-14 20:12 /usr/src/linux -> linux-2.6.18-gentoo-r4
172 neysx 1.21 <comment>(Make sure /usr/src/linux links to your current kernel.)</comment>
173 peesh 1.1 # <i>cd /usr/src/linux</i>
174     # <i>make menuconfig</i>
175 swift 1.8 </pre>
176    
177 swift 1.9 <pre caption="make menuconfig options">
178 nightmorph 1.37 Processor type and features --->
179 swift 1.8 &lt;*&gt; MTRR (Memory Type Range Register) support
180 nightmorph 1.37 Device drivers --->
181 nightmorph 1.42 Graphics support --->
182     &lt;M&gt; /dev/agpgart (AGP Support) --->
183     <comment>(The agpgart option is not present on 64-bit kernels; just choose your chipset support.)</comment>
184     &lt;M&gt; Intel 440LX/BX/GX, I8xx and E7x05 support
185     <comment>(Enable your chipset instead of the above.)</comment>
186     &lt;M&gt; Direct Rendering Manager (XFree86 4.1.0 and higher DRI support) --->
187     &lt;M&gt; <comment>(Select your graphics card from the list)</comment>
188 swift 1.8 </pre>
189 peesh 1.1
190 swift 1.8 </body>
191     </section>
192     <section>
193     <title>Compile and install your kernel</title>
194     <body>
195 peesh 1.1
196 swift 1.9 <pre caption="Compiling and installing kernel">
197 nightmorph 1.37 # <i>make &amp;&amp; make modules_install</i>
198 swift 1.8 </pre>
199    
200     <p>
201 nightmorph 1.37 Don't forget to set up <path>grub.conf</path> or <path>lilo.conf</path> and run
202     <c>/sbin/lilo</c> if you use LILO.
203 swift 1.8 </p>
204    
205     </body>
206     </section>
207 peesh 1.1 </chapter>
208    
209 swift 1.8 <chapter>
210 nightmorph 1.37 <title>Configure direct rendering</title>
211 swift 1.20 <section id="configure_xorg">
212 swift 1.17 <title>Configure Xorg.conf</title>
213 swift 1.8 <body>
214    
215     <p>
216 swift 1.41 Open <path>/etc/X11/xorg.conf</path> with your favorite text editor and edit
217 swift 1.8 it to enable DRI and GLX.
218     </p>
219 peesh 1.1
220 swift 1.17 <pre caption="xorg.conf">
221 peesh 1.1 ...
222     Section "Module"
223 swift 1.8 Load "dri"
224     Load "glx"
225     ...
226 peesh 1.1 EndSection
227     ...
228     Section "Device"
229 swift 1.8 Driver "radeon"
230 nightmorph 1.37 <comment>(Replace radeon with the name of your driver.)</comment>
231 swift 1.8 ...
232 peesh 1.1 EndSection
233     ...
234 swift 1.7 Section "dri"
235 swift 1.8 Mode 0666
236 peesh 1.1 EndSection
237 swift 1.8 </pre>
238    
239     </body>
240     </section>
241 fox2mike 1.27 <section>
242     <title>Changes to modules.autoload.d</title>
243     <body>
244    
245     <p>
246     You will need to add the module name that your card uses to
247     <path>/etc/modules.autoload.d/kernel-2.6</path> to ensure that the module is
248     loaded automatically when the system starts up.
249     </p>
250    
251     <pre caption="Editing /etc/modules.autoload.d/kernel-2.6">
252     <comment>(Change module name as required.)</comment>
253     intel-agp
254     </pre>
255    
256 nightmorph 1.29 <note>
257     If you compiled <c>agpgart</c> as a module, you will also need to add it to
258     <path>/etc/modules.autoload.d/kernel-2.6</path>.
259     </note>
260    
261 fox2mike 1.27 </body>
262     </section>
263 peesh 1.1 </chapter>
264    
265 swift 1.8 <chapter>
266     <title>Test 3D acceleration</title>
267     <section>
268     <title>Reboot to the new kernel</title>
269     <body>
270    
271     <p>
272 nightmorph 1.38 Reboot your computer to your new kernel and login as a normal user. It's time to
273     see if you have direct rendering and how good it is. <c>glxinfo</c> and
274     <c>glxgears</c> are part of the <c>mesa-progs</c> package, so make sure it is
275     installed before you attempt to run these commands.
276 swift 1.8 </p>
277 peesh 1.1
278 swift 1.9 <pre caption="Testing rendering">
279 nightmorph 1.29 $ <i>startx</i>
280 jkt 1.32 <comment>(No need to load modules for your driver or agpgart, even if you compiled them as a module.)</comment>
281 neysx 1.21 <comment>(They will be loaded automatically.)</comment>
282 nightmorph 1.29 $ <i>glxinfo | grep rendering</i>
283 peesh 1.1 direct rendering: Yes
284 jkt 1.32 <comment>(If it says "No", you don't have 3D acceleration.)</comment>
285 nightmorph 1.29 $ <i>glxgears</i>
286 swift 1.41 <comment>(Test your frames per second (FPS) at the default size. The number should be
287     significantly higher than before configuring DRM. Do this while the CPU is as idle as
288 nightmorph 1.37 possible.)</comment>
289 swift 1.8 </pre>
290    
291 nightmorph 1.37 <note>
292     FPS may be limited by your screen's refresh rate, so keep this in mind if
293 nightmorph 1.44 <c>glxgears</c> reports only about 70-100 FPS. <c>games-fps/ut2004-demo</c> or
294     other 3D games are better benchmarking tools, as they give you real-world
295     performance results.
296 nightmorph 1.37 </note>
297 swift 1.8
298     </body>
299     </section>
300     <section>
301     <title>Get the most out of direct rendering</title>
302     <body>
303    
304     <p>
305 nightmorph 1.44 If you want to set more features, for performance or other reasons, check out
306     the <uri link="http://dri.freedesktop.org/wiki/FeatureMatrix">feature
307     matrix</uri> on the DRI web site or the <uri
308 neysx 1.25 link="http://dri.sourceforge.net/doc/dri_driver_features.phtml">features
309     listing</uri> on Sourceforge.
310 swift 1.8 </p>
311    
312     </body>
313     </section>
314 peesh 1.1 </chapter>
315    
316     <chapter>
317 swift 1.8 <title>Troubleshooting</title>
318     <section>
319     <title>It doesn't work. I don't have rendering, and I can't tell why.</title>
320     <body>
321    
322     <p>
323 nightmorph 1.37 Try <c>modprobe radeon</c> before you start the X server (replace <c>radeon</c>
324     with the name of your driver). Also, try building agpgart into the kernel
325     instead of as a module.
326 swift 1.8 </p>
327    
328     </body>
329     </section>
330     <section>
331 cam 1.13 <title>When I startx, I get this error: "[drm] failed to load kernel module agpgart"</title>
332 swift 1.8 <body>
333    
334     <p>
335 swift 1.41 That's because you compiled agpgart into the kernel instead of as a module.
336 swift 1.8 Ignore it unless you're having problems.
337     </p>
338    
339     </body>
340     </section>
341     <section>
342     <title>I have a Radeon, and I want TV-Out.</title>
343     <body>
344    
345     <p>
346 nightmorph 1.40 The drivers originally developed by the <uri
347     link="http://gatos.sf.net">GATOS</uri> project have been merged into Xorg's
348     codebase. You don't need anything special for TV-Out;
349     <c>x11-drivers/xf86-video-ati</c> will work just fine.
350 swift 1.8 </p>
351    
352     </body>
353     </section>
354     <section>
355 nightmorph 1.37 <title>
356     It doesn't work. My card is so incredibly new and cool that it isn't supported
357     at all.
358     </title>
359 swift 1.8 <body>
360    
361     <p>
362 nightmorph 1.37 Try out the binary drivers. For <c>ati-drivers</c>, a listing is at
363 nightmorph 1.45 <uri>http://support.amd.com/us/gpudownload/Pages/index.aspx</uri>. If those
364     don't support it, use fbdev. It's slow, but it works.
365 swift 1.8 </p>
366    
367     </body>
368     </section>
369     <section>
370     <title>I have a PCI card and it doesn't work. Help!</title>
371     <body>
372    
373     <p>
374 swift 1.41 Edit <path>/etc/X11/xorg.conf</path>. In section "Device" enable ForcePCIMode.
375 swift 1.8 </p>
376    
377 swift 1.9 <pre caption="Enabling ForcePCIMode">
378 swift 1.8 Option "ForcePCIMode" "True"
379     </pre>
380    
381     </body>
382     </section>
383 peesh 1.1 </chapter>
384    
385 swift 1.8 <chapter>
386     <title>References</title>
387     <section>
388     <body>
389    
390     <ol>
391 neysx 1.25 <li><uri>http://forums.gentoo.org/viewtopic.php?t=46681</uri></li>
392     <li><uri>http://forums.gentoo.org/viewtopic.php?t=29264</uri></li>
393     <li><uri>http://dri.freedesktop.org/</uri></li>
394     <li><uri>http://www.retinalburn.net/linux/dri_status.html</uri></li>
395 swift 1.8 </ol>
396 swift 1.7
397 swift 1.8 </body>
398     </section>
399 peesh 1.1 </chapter>
400     </guide>

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