I have exactly the same problem (screen freezes for a second or two, then goes black, then the lightdm login screen appears and I have to log into a new session. Happens at apparently random times, several times a day, generally when doing very light tasks) but I have intel graphics (Thinkpad T410).
-- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1045519 Title: Xorg crashes persistently To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1045519/+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
