Last time I wrote that there was a problem with my GLX support. It is past now. Looked in to xorg logs and I have found that it is trying to access /usr/lib/dri/atiogl_a_dri.so library and it failing. Quick look in to /usr/lib/dri showed me that yes, this files was missing. Files which were present : r200_dri.so r300_dri.so radeon_dri.so only. So a usual quick fix by symlinking missing filename to one of the present files … worked 🙂 I have linked it to radeon_dri.so. Don’t know if it is from Ati Drivers but it works fast so I will not complain.