caramba, o que preciso fazer , tenho um nvidia fx-5200, com os drivers corretamente instalados.
otacilio@Matrix:~$ glxgears -printfps
1733 frames in 5.0 seconds = 346.466 FPS
1796 frames in 5.0 seconds = 359.149 FPS
1794 frames in 5.0 seconds = 358.710 FPS
1818 frames in 5.0 seconds = 363.463 FPS
1818 frames in 5.0 seconds = 363.565 FPS
1794 frames in 5.0 seconds = 358.789 FPS
1812 frames in 5.0 seconds = 362.261 FPS
1786 frames in 5.0 seconds = 357.108 FPS
1793 frames in 5.0 seconds = 358.554 FPS
1808 frames in 5.0 seconds = 361.552 FPS
1809 frames in 5.0 seconds = 361.657 FPS
1800 frames in 5.0 seconds = 359.801 FPS
1792 frames in 5.0 seconds = 358.370 FPS
1793 frames in 5.0 seconds = 358.441 FPS
X connection to :0.0 broken (explicit kill or server shutdown).
otacilio@Matrix:~$