Comment 8 for bug 982307

I can reliably reproduce this bug if I click the Unity menu bar on the sound icon to pause music and then walk away from the screen. This leaves the menu-bar focused. When returning to the computer, the screen is blank. Moving the mouse results in seeing the entire desktop in an unlocked state. If I attempt to interact with the machine by clicking or typing, the lock screen suddenly pops up and makes me type in my password.