Ever since the 15.x track of beta drivers came out I can no longer use 1600x1200 on a Dell 2001FP with my R9 270X. My setup is two 16:9 1080p displays and a 4:3 Dell 2001FP display. If I switch back to 14.12 the 2001FP operates in 1600x1200 as expected. When I upgrade to the 15.x beta drivers it appears to force the 2001FP to run in 16:9. While 1600x1200 is missing there is still 1280x1024 available as an option but that doesn't even scale properly as it should on a 4:3 display. The odd part is, CCC does detect the display as a Dell 2001FP with a native resolution of 1600x1200.
Anyone else run into this? I realize beta is buyer beware but it seems they've given up on the non-beta drivers so I have to assume the betas will eventually become production and then one of my displays is effectively rendered useless if I want to run newer drivers on a card that is far from old.