Forwarded from <http://bugs.debian.org/522054> Since upgrading to intel 2.6.1 and drm 2.4.5, 3d acceleration has not been working very well on my Samsung Q45 (laptop). glxgears runs ok (phew!) but Blender no longer redraws its screen, celestia uses very low resolution textures and a program I am developing where I work causes the whole system to freeze (unfortunately I don't have a minimum test case for that last one yet). This happens with both Linux 2.6.26 and 2.6.29. If I downgrade libdrm2 and libdrm-intel1 to version 2.4.4+git+20090205 +8b88036-1 then things work OK again.
Created attachment 24730 [details] blender screenshot
Created attachment 24731 [details] celestia screenshot
Still present in 2.7.0 with drm DRM 2.4.9. Additionally, celestia is now very very slow. As in, 1 FPS slow.
Actually, I just looked at the clock, and it only updates once every three seconds!
I'm now using Xorg 1.6.3 with intel 2.8.1 and drm 2.4.13. Blender is fine. Celestia is still very, very slow however. In the order of several seconds per frame.
Rendering is better with xserver 1.6.5, intel 2.9.1, drm 2.4.15 and 2.6.32.
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