https://bugs.freedesktop.org/show_bug.cgi?id=36065
--- Comment #1 from pelloux@gmail.com 2011-04-08 05:02:00 PDT --- Here's a few more information, hoping it could help :
From Xorg.0.log :
[KMS] Kernel modesetting enabled.
From glxinfo :
EE r600_pipe.c:430 r600_get_param - r600: unknown param 45 name of display: :0 [...] direct rendering: Yes OpenGL renderer string: Gallium 0.4 on AMD RV770
From lscpci -v :
VGA compatible controller: ATI Technologies Inc RV770 [Radeon HD 4850] (prog-if 00 [VGA controller]) (PCI-E)