Can you try unchecking "Activate Screensaver when Idle" and "Lock screen when computer is inactive" in the screensaver settings (system - preferences - screensaver) as well as changing the setting "Put display to sleep when inactive for.." to never in power management settings? If this problem doesn't occur with those settings we can verify that it is a duplicate of another bug (Bug 535640) with a fix pending which is very much looks like.
** Changed in: xserver-xorg-video-intel (Ubuntu) Status: New => Incomplete -- Lucid Beta 2.6.32-17 browsing Lucid forum screen went black no keyboard https://bugs.launchpad.net/bugs/548380 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