I have noticed exactly the same problem, just replace AMD with NVidia and its just the same. I suspect a Xorg problem with this rather than an AMD one.
** Attachment added: "Reveleant information from kern.log" http://launchpadlibrarian.net/34316335/kern.log ** Also affects: xorg (Ubuntu) Importance: Undecided Status: New -- System has encountered access violation crash in kernel and has locked up. https://bugs.launchpad.net/bugs/436326 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
