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List: freedesktop-xorg
Subject: Re: SiS, DRI and DRM
From: Ian Romanick <idr () us ! ibm ! com>
Date: 2006-08-31 20:32:43
Message-ID: 44F7476B.4080403 () us ! ibm ! com
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Vicente Helano wrote:
> Hi All,
> I am having problems with a sis300 agp graphics card.
> I compiled kernel 2.6.17 with Direct Rendering Manager (DRM) support
> for sis300/305 graphics cards. When the X server (X11R6.8.2) is started
> the DRI and DRM modules are correctly loaded. However, my OpenGL
> applications get wrong rendering (object surfaces seem to have wrong
> normals).
> If the kernel is compiled without DRM support, everything seems ok. But
> now, looking at Xorg.0.log I found an error message telling that DRM
> module was not found.
> What is going wrong?
When there is no DRM support, 3D falls back to using the software patch.
I'm sure you also notice in that case that it's *much* slower.
As for problems with the SiS driver, I don't think it has gotten any
support in a long time. Do you see errors in all applications (e.g.,
glxgears), or just some? Could you post a link to a screen shot? Could
you also post the output of glxinfo?
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