It appears you have run into an intermittent freezing bug with the intel graphics driver.
There is a wiki page with possible solutions you may want to try. Probably the simplest is to boot from an older kernel and see if the problem recurs. https://wiki.ubuntu.com/X/Bugs/Lucidi8xxFreezes ** Package changed: xorg (Ubuntu) => xserver-xorg-video-intel (Ubuntu) -- computer freezes on screensaver after upgrade to 10.04 https://bugs.launchpad.net/bugs/577308 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel 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
