It seems related to screen power settings, since it only triggers after some time of inactivity.
-- 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/1110512 Title: xorg started crashing after driver update To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1110512/+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