Also happens for me. X is completly frozen and the machine needs a hard reboot. Logging in through SSH works though. 100% CPU utilization for the process that was using the ATI graphics card, in my case that process is always XBMC.
Dump message from dmesg in attachment. ** Attachment added: "dmesg dump for the crash" https://bugs.launchpad.net/ubuntu/+source/fglrx-installer/+bug/881526/+attachment/2632137/+files/dump.txt -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to fglrx-installer in Ubuntu. https://bugs.launchpad.net/bugs/881526 Title: System freezes, kernel crashes, "[fglrx] ASIC hang happened" To manage notifications about this bug go to: https://bugs.launchpad.net/fglrx/+bug/881526/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp