I'm using Ubuntu 12.04. Downloaded and ran a game called Defcon, by Introversion Software, and then my display problems began!

At first, my smallest monitor stopped receiving input. Then, when I exit the game, still no input & I look at the 'Display' System Settings menu and it is off. I try switching it back on, and my system totally crashes. I restart my system, and try two more times at switching it back on, before I go back to basics and switch mirroring on before switching that monitor on.

Now I've switched mirroring off, but if I set the resolution for my largest monitor above that of my other monitor, my system crashes! What the heck!

Does anyone have a solution to my problems?