Hello This seems to me an hardware problem, but the next time that this happens, plese reboot and type in a terminal:
apport-collect -p xorg 733689 Thanks Fabio ** Changed in: xorg (Ubuntu) Status: New => Incomplete -- 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/733689 Title: Occasionally, login screen is not the correct resolution _______________________________________________ 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