it might be that the long history of bug 314 does give you what you want.
its about the Radeon IGP but might apply to your hardware as well.
----- Original Message -----
From: "Rafal Gala" <lista@...>
Sent: Thursday, January 08, 2004 2:37 PM
Subject: [Dri-users] Mobility Radeon + DRI
> I'm using Compaq EvoN600C laptop with Mobility Radeon card.
> My system is Debian unstable with 2.6.0 kernel.
> When I was using 2.4.23 kernel I had the problem with DRI that caused X
> freeze when I run some application that uses DRI, for example glxgears
> or tuxracer. I was using the default kernel radeon module. The solution
> was to compile radeon DRM kernel modules from
> http://www.xfree86.org/~alanh/. After loading the compiled module,
> everything worked perfectly.
> Now I use 2.6.0 kernel and here is the same problem that was in 2.4.23
> (this is probably some bug in all radeon modules included in the
> kernels). Unfortunately, modules from above site cannot be compiled
> under 2.6.0 and I can't get DRI working, it still freezes my X server :(
> I'm stuck and don't know what to do :(
> Any ideas?
> Best regards