I recently updated to ubuntu 12.10, and opened a game which changed the screen resolution. Unfortunately when it closed it did not set the resolution back, and when I try and set it to the correct res. my screen just goes to sleep! I am using some sort of nvidia card, not a new one, and I am not using any nvidia drivers, just the standard ones. I am now stuck on 600x400 res.! What should I do? Any ideas?