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Gentoo's Bugzilla – Attachment 86363 Details for
Bug 116506
Hardware Acceleration Guide lacks checks for hardware support of options
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[patch]
dri-howto.xml.patch
dri-howto.xml.patch (text/plain), 4.26 KB, created by
nm (RETIRED)
on 2006-05-07 07:39:28 UTC
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Description:
dri-howto.xml.patch
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Creator:
nm (RETIRED)
Created:
2006-05-07 07:39:28 UTC
Size:
4.26 KB
patch
obsolete
>Index: dri-howto.xml >=================================================================== >RCS file: /var/cvsroot/gentoo/xml/htdocs/doc/en/dri-howto.xml,v >retrieving revision 1.29 >diff -u -r1.29 dri-howto.xml >--- dri-howto.xml 7 May 2006 12:39:17 -0000 1.29 >+++ dri-howto.xml 7 May 2006 14:38:04 -0000 >@@ -442,8 +442,66 @@ > <body> > > <p> >-A few options may increase performance by up to 30 percent (or more) over the >-default. Set them in <path>/etc/X11/xorg.conf</path>. >+A few options may increase performance by up to 30 percent (or more) over the >+default. Set them in <path>/etc/X11/xorg.conf</path>. However, you will first >+need to check that your motherboard and video card support these options. >+</p> >+ >+<p> >+First, let's see if your video card can support fast writes. We'll do this by >+closely inspecting the output from <c>lspci</c>. Specifically, we are looking >+at the "VGA compatible controller" information. >+</p> >+ >+<pre caption="Video card check"> >+# <i>lspci -vv</i> >+01:00.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility M6 LY (prog-if 00 [VGA]) >+. . . >+Capabilities: [58] AGP version 2.0 >+ Status: RQ=48 Iso- ArqSz=0 Cal=0 SBA+ ITACoh- GART64- HTrans- 64bit- FW+ AGP3- Rate=x1,x2,x4 >+</pre> >+ >+<p> >+While quite a lot of information is produced, we are looking for <b>FW</b> in >+the "Status" subsection of the AGP "Capabilities" section. If <b>FW+</b> is >+present in the "Status" line, it means the card supports fast writes. We can >+now check if the motherboard supports fast writes. >+</p> >+ >+<impo> >+If you do not see <b>FW+</b>, but instead see <b>FW-</b>, you cannot enable >+fast writes in <path>xorg.conf</path>. Your card does not support fast writes. >+</impo> >+ >+<p> >+Now let's make sure the motherboard supports fast writes as well. This time, >+look at the "Host bridge" section of your <c>lspci</c> output. >+</p> >+ >+<pre caption="Motherboard check"> >+# <i>lspci -vv</i> >+00:00.0 Host bridge: Intel Corporation 82830 830 Chipset Host Bridge (rev 02) >+. . . >+Capabilities: [a0] AGP version 2.0 >+ Status: RQ=32 Iso- ArqSz=0 Cal=0 SBA+ ITACoh- GART64- HTrans- 64bit- FW+ AGP3- Rate=x1,x2,x4 >+</pre> >+ >+<p> >+Again, examine the "Status" subsection of your AGP "Capabilities" section. Look >+for <b>FW</b>. If you see <b>FW+</b>, your motherboard supports fast writes. >+</p> >+ >+<impo> >+Remember, both your video card information and your motherboard information >+must show the same <b>FW</b> capability. If either device shows <b>FW-</b> in >+"Status", you cannot enable fast writes in <path>xorg.conf</path>. >+</impo> >+ >+<p> >+Assuming that all has gone well and both your motherboard and video card >+support fast writes, let's enable this option in >+<path>/etc/X11/xorg.conf</path> and get the best performance out of your >+hardware. > </p> > > <pre caption="xorg.conf"> >@@ -470,46 +528,6 @@ > enable the appropriate option in your BIOS. > </note> > >-<!-- >-** >-This section needs to be in eventually, but non-nvidia cards don't use >-/proc/driver at all. We need some way to get users to check and see that SBA >-and fast-writes are allowed for their hardware; that info is somewhere else in >-/proc. If you have a non-nvidia card, you can help by emailing >-nightmorph@gentoo.org with the relevant bits of your /proc so I can get this >-info into the guide. See below for where things are found on an nvidia card. >-** >- >-<p> >-A few options may increase performance by up to 30 percent (or more) over the >-default. Set them in <path>/etc/X11/xorg.conf</path>. However, you will first >-need to check that your motherboard and video card support these options. >-</p> >- >-<p> >-First, let's check the supported modes of your video cards, and see if your it >-supports fast writes. Remember to replace <c>nvidia</c> with the actual name of >-your device in <path>/proc/driver/nvidia/</path>. >-</p> >- >-<pre caption="Video card check"> >-$ <i>cat /proc/driver/nvidia/agp/card</i> >-</pre> >- >-<p> >-Next, let's check out the capabilities of the motherboard: >-</p> >- >-<pre caption="Motherboard check"> >-$ <i>cat /proc/driver/nvidia/agp/host-bridge</i> >-</pre> >- >-<impo> >-Remember, the modes and capabilities for your video card and motherboard must >-match for these settings to work! >-</impo> >---> >- > <p> > If you want to set even more features, check out the <uri > link="http://dri.freedesktop.org/wiki/FeatureMatrix">feature matrix</uri> on
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Attachments on
bug 116506
:
75398
|
76251
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76254
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76258
|
86285
| 86363