I have upgraded to oneric, and this problem appears to no longer happen (or at least, hasn't happened yet).
I suspect this was driver related, and given the fact that oneric gives me about 600 fps as opposed to 60 fps in natty, I'm inclined to think that the graphics driver quality has improved overall. My guess is that this bug can now be closed. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/821749 Title: Screen Drawing Ceases Updating (ex, ScreenSaver stays black), Mouse- Pointer Updates Correctly To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-evdev/+bug/821749/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs