https://bugzilla.kernel.org/show_bug.cgi?id=39972

--- Comment #8 from Robert Piasek dagger@gentoo.org 2011-08-15 09:21:26 --- I tested above commit against 3.0.1 and I can confirm it solves the problem for me. Thank you very much! I'm sorry I didn't have time to bisect it.

xrandr gives the same output as 2.6.39

Screen 0: minimum 320 x 200, current 3840 x 2160, maximum 8192 x 8192 DisplayPort-0 connected 1920x1080+0+1080 (normal left inverted right x axis y axis) 509mm x 286mm 1920x1080 60.0*+ 1280x1024 75.0 60.0 1152x864 75.0 1024x768 75.1 60.0 800x600 75.0 60.3 640x480 75.0 60.0 720x400 70.1 DisplayPort-1 connected 1920x1080+1920+1080 (normal left inverted right x axis y axis) 509mm x 286mm 1920x1080 60.0*+ 1280x1024 75.0 60.0 1152x864 75.0 1024x768 75.1 60.0 800x600 75.0 60.3 640x480 75.0 60.0 720x400 70.1 DisplayPort-2 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 509mm x 286mm 1920x1080 60.0*+ 1280x1024 75.0 60.0 1152x864 75.0 1024x768 75.1 60.0 800x600 75.0 60.3 640x480 75.0 60.0 720x400 70.1 DisplayPort-3 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 509mm x 286mm 1920x1080 60.0*+ 1280x1024 75.0 60.0 1152x864 75.0 1024x768 75.1 60.0 800x600 75.0 60.3 640x480 75.0 60.0 720x400 70.1

Thanks again!