Reproduce Steps(steps,current result, reproduce possibility) =========================================================== (1) Boot moblin (2) Change the time back by a couple of hours using the gnome date tool. For some reason the bug doesn't seem to appear if I use the date command to set the time. (3) Mutter will now hang making the system completely unusable. I think this is a separate issue related to bug #3839. (4) Press the power button to reboot the system. (5) The boot splash screen will be displayed but X will not start. After a while the hard disk will settle down and it will stop doing anything. (6) Press Ctrl+Alt+F1 to switch to a terminal. You should see a message saying something along the lines of 'superblock last mount time is in the future. UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.'