I've had this occasionally with Jaunty, including just now. gnome- screensaver was taking up 99% of CPU while it 'checked my password'. Killing gnome-screensaver didn't work - the X window didn't redraw itself, but just stayed stuck on a black screen with a white box where the 'Checking your password' window used to be. I had to reboot.
I had also just enabled automatic user login and then disabled it, similarly to what chrism2671 noted. -- Unable to unlock the screensaver https://bugs.launchpad.net/bugs/181065 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-screensaver in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs