I tossed mint 14 on a old P4. I was using a ancient 17' monitor at 1024. I have a new benq monitor and yet mint says it's unknown and I am stuck at 1024 even though it's 1920. I would have thought it would be seen when I fired mint up. Maybe it's the card, a old Nvidia Geforce 4 using legacy drivers. I'll probably have to do a fresh install or toss ubunto on.