The problem appears after a few minutes, without any particular reason. I will try to deactivate the nVidia driver and see if the problem appears again.
-- X server stuck at 100%, screen frozen, critical, recovery: manual power off https://bugs.launchpad.net/bugs/589352 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server 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