As with Bug# 54352 - I don't appear to be having this problem anymore at all with 6.6.2-0ubuntu3. Marking fixed, thanks!
** Changed in: xserver-xorg-video-ati (Ubuntu) Status: Needs Info => Fix Released -- ATI Technologies Inc RV350 AR [Radeon 9600] hangs occasionally when dri enabled https://launchpad.net/bugs/32124 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs