GMA950 and slow 3D

[Joonas Saarinen]

Hello everyone!

I have a laptop with the Intel GMA950 graphics controller and I am 
trying to get the 3D acceleration to work.

The strange thing is that everything looks fine - the kernel DRI modules 
are in place, Xorg driver works, glxinfo reports direct rendering as 
enabled, and so on. However it seems that no hardware acceleration is 
really being used at all and everything is software-drawn. Even the 
basic OpenGL screensavers have a high CPU usage and games are 
unplayable.

I have tried upgrading the i810 driver and Mesa stuff to their newest 
versions without any luck. Xorg version is 7.1.1 and Linux kernel is 
2.6.17.13.

As some other notes, I perceived some xf86AllocateGARTMemory errors in 
Xorg log. I tried bumping the VideoRam up to 131072 with no difference. 
Also I get several "AIGLX: 3D driver claims to not support visual (n)" 
warnings.

By the way, is the GLcore module required? In Debian Xorg configuration 
it seems to be absent by default. Adding it gives a undefined symbol 
error related to __glapi_Dispatch and the module never gets loaded. 
Possibly some Debian breakage...

Any help or hints will be appreciated.