Every time I launch IW4M, it isn't in 1080p. When I change it to 1080p and asks if I want to apply, I click yes, then my screen just goes black and it doesn't take me to the menu. I have to bring up task manager and close it. It used to work just fine, but only started happening recently. And its not because of my hardware, because I ran it in 1080p maxed at 90+ fps before. I've tried configuring the .ini to 1920x1080, but it still doesn't work. Anyone have any ideas?

Have you tried changing it in config_m2.cfg and making it write protected? And have you tried reinstalling?

If config_m2.cfg is being a bitch, just delete it and the game will create a clean one.