Downgrading to xserver-xorg-video-ati_6.6.3-2ubuntu6_i386.deb fixed this for me.
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/148408/comments/27
Downgrading to xserver- xorg-video- ati_6.6. 3-2ubuntu6_ i386.deb fixed this for me.
https:/ /bugs.launchpad .net/ubuntu/ +source/ xserver- xorg-video- ati/+bug/ 148408/ comments/ 27