I believe I had a similar problem (not sure if is really the same, I will report a separate bug which can possibly later be duped to this one after things have become more clear).
What I have currently done is to revert back to the latest version of xserver-xorg-video-ati from feisty which still worked well for me and did not have a number of other serious problems.
I believe I had a similar problem (not sure if is really the same, I will report a separate bug which can possibly later be duped to this one after things have become more clear).
What I have currently done is to revert back to the latest version of xserver- xorg-video- ati from feisty which still worked well for me and did not have a number of other serious problems.