I was experiencing this problem (screen freezes except mouse pointer, but can still Ctrl-Alt-F1 to a terminal) regularly until a few days ago when I went into power manager and set "Put display to sleep when inactive for:" to Never (for both AC and battery). Since then, I have not had the problem at all, though of course my display also never goes to sleep. :-)
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/762918 Title: Natty Screensaver freezes system after some period of inactivity -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs