I run 2 screens on an AMD r9 280x card, and I need to rotate my secondary screen. When I try to do that via the display settings, my main screen gets all garbled up and is unusable. This happens with both proprietary and open source drivers.
My OS is Lubuntu 14.04 LTS. I have not had this problem with the lubuntu default LXDE, but the problem remains with mate, cinnamon, unity. have not tried with kde, but anyway I want to end up using cinnamon.
Any ideas on how I can fix this? I really need this second screen rotated due to space constraints at my desk, and compatibility with my dualbooted windows.
Things I have tried:
- try different drivers: proprietary, open source
- no inspiration for anything else so far :/
My first (main) screen: Dell U2515h, connected through Mini DisplayPort.
Second screen: Dell 2209WA, connected through hdmi and converted into DVI (only supports VGA and DVI input)
Rotating the main screen doesn't seem to give any problems.