I have this same problem. if power management is disabled I either get a white X on a blank screen pr just a blank screen. With poer management enabled The screensaver works normally.
-- Disabling energy saving of monitor; changes the normal screensaver to a e.g. blank screen or a screen with an X https://launchpad.net/bugs/70991 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
