I am currently using an HP Pavilion dv6t. In case it matters, my Linux kernel version is 3.3.6-030306-generic. In my battery settings, I have it set to "Do Nothing" when the lid is closed (for both battery and A/C power). When I close the lid, the screen turns off and upon opening turns back on and asks me to reinput my password. However, about 10% of the time the password screen doesn't appear. It just shows my wallpaper. This is a rather annoying UI error which forces me to restart with the power button. This gets rather annoying as it can cause loss of data, and seems to occur completely at random. Is there any known fix for this?