I read other reports about similar in forums too It helped to revert xserver-xorg-core to 1:1.0.2-0ubuntu10
-- X fails to find ATI Radeon chip after upgrade to xserver-xorg-core-1:1.0.2-0ubuntu10.3 https://launchpad.net/bugs/57287 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
