This is a known problem, and related to the "ati" driver not delegating the video handling to the "radeon" driver. A big problem, but unfortunately still no fix available (besides a workaround of changing xorg.conf to use "radeon").
This and the other duplicates are thus duplicates of bug 30284.
This is a known problem, and related to the "ati" driver not delegating the video handling to the "radeon" driver. A big problem, but unfortunately still no fix available (besides a workaround of changing xorg.conf to use "radeon").
This and the other duplicates are thus duplicates of bug 30284.