I'm unable to repoduce this fault with my laptop (Asus V6V) with both the screensaver and the 'Lock Screen' working as usual. Was there anything in your logs on this fault?
-- pressing special keys on laptop breaks screensaver https://launchpad.net/bugs/37946 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs