So, I have a really weird problem. I have 2 monitors, one 1920x1080, one 2560x1080. When both monitors are plugged in, everything is fine. However, when I unplug the 1920x1080 monitor, my 2560x1080 monitor gets forced into 1920x1080 no matter what I do. This was never a problem until about 3 days ago. I've tried a complete reinstall of my drivers, resetting my monitor settings, and forcing a custom resolution in the Catalyst Control Center. Any tips?
GPU: ASUS Strix R9 390
MB: MSI Krait 3x Z170