Bug #1174169 shows that others have run into the same thing. They mention that battery/AC has something to do with it. My laptop battery is completely dead, all my issues have occurred on AC, though with the dead battery still installed.
Bug #1174169 shows that others have run into the same thing. They mention that battery/AC has something to do with it. My laptop battery is completely dead, all my issues have occurred on AC, though with the dead battery still installed.