I have an issue where xrandr displays a lot of supported modes for my monitor... But most of the modes don't work with my monitor at all. The problem seems related to the proprietary nvidia driver incorrectly reporting what modes my monitor supports. I've tried explicitly defining modes in my xorg.conf before with no luck.
Anyone have any idea how to fix this? It's an issue when I start to start a game and it switches my monitor to an unsupported mode. It's VERY annoying.