I'm using Kubuntu 13.04 with 2 monitors, primary at DVI-0 and the second one at DisplayPort-0. Video card is a Radeon HD 8490. Since it isn't supported by the proprietary drivers, the radeon kernel module is used.
After installing the system both monitors worked fine with a maximum resolution of 1920x1200 @ 60 Hz. However, after a system crash the second monitor is stuck to a resolution of 1024x768@60 Hz.
I tried to
- reinstall xserver-xorg-video-ati and xserver-org
- manually set the resolution using xrandr
which did not help.
When I install the proprietary graphics driver, it tells my my video card is not supported on the lower right edge of the screen, but both monitors work with 1920x1200 again. Switching back to the other driver leaves me with the same problem again.
Can anyone give me a hint?