No se si us pot servir d'ajuda, perquè per el que no faig servir la accelaració grafica 3d com minim de forma conscient.
Estic a sid amb aquesta tarja.
perico@despatx:~$ glxgears
3439 frames in 5.0 seconds = 687.653 FPS
3521 frames in 5.0 seconds = 701.955 FPS
3496 frames in 5.0 seconds = 699.142 FPS
3453 frames in 5.0 seconds = 690.506 FPS
3507 frames in 5.0 seconds = 701.292 FPS
3499 frames in 5.0 seconds = 699.674 FPS
3500 frames in 5.0 seconds = 699.997 FPS
3500 frames in 5.0 seconds = 699.800 FPS
3446 frames in 5.0 seconds = 689.151 FPS
3502 frames in 5.0 seconds = 700.284 FPS
3483 frames in 5.0 seconds = 696.449 FPS
perico@despatx:~$ aptitude search mesa- | grep ^i
i libgl1-mesa-dev - free implementation of the OpenGL API -- G
i libgl1-mesa-dri - free implementation of the OpenGL API -- D
i libgl1-mesa-glx - free implementation of the OpenGL API -- G
i libglu1-mesa-dev - Mesa OpenGL utility library -- development
i mesa-common-dev - Developer documentation for Mesa
i mesa-utils - Miscellaneous Mesa GL utilities
perico@despatx:~$ glxinfo | grep OpenGL
OpenGL vendor string: Mesa Project
OpenGL renderer string: Software Rasterizer
OpenGL version string: 2.1 Mesa 7.11
OpenGL shading language version string: 1.20
OpenGL extensions: