Bump. Got Excacly the same issue. Followed a couple of threads and ended up here. I cant explain it better than you so i'll Copy your posts, Marc.
Followed.
Setup: Kubuntu 13.10 AMD 14.3 beta AMD Radeon HD R9 290x
3.11.0-18-generic 2x 30" dell. One one DVI and one on DP. 2560*1600x2
Bump.
Got Excacly the same issue. Followed a couple of threads and ended up here. I cant explain it better than you so i'll Copy your posts, Marc.
Followed.
Setup:
Kubuntu 13.10
AMD 14.3 beta
AMD Radeon HD R9 290x
3.11.0-18-generic
2x 30" dell. One one DVI and one on DP. 2560*1600x2