My initial guess would be a hardware problem (I had almost identical symptoms on a 5xx card a few months ago, that went away once I swapped it out with a new card), but just in case it isn't, I can send the bug report upstream first and see what they say.
-- Graphics Card Fan Suddenly Stopped While Using Computer https://bugs.launchpad.net/bugs/554783 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-ati in ubuntu. _______________________________________________ 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