I need some hints because of my 3 screen setup:
I have an Lenovo X240 with ultradock, which supports displaying to 3 screens. But my external screens are recognized as one generic screen. See my actual xrandr query output:
xrandr -q
Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 32767 x 32767
eDP1 connected primary 1920x1080+1920+0 (normal left inverted right x axis y axis) 276mm x 156mm
1920x1080 60.0*+ 59.9
1680x1050 60.0 59.9
1600x1024 60.2
1400x1050 60.0
1280x1024 60.0
1440x900 59.9
1280x960 60.0
1360x768 59.8 60.0
1152x864 60.0
1024x768 60.0
800x600 60.3 56.2
640x480 59.9
DP1 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
DP2 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 521mm x 293mm
1920x1080 60.0*+ 59.9
3840x1080 60.0
2560x1024 60.0
1680x1050 60.0
1280x1024 75.0 60.0
1440x900 59.9
1280x960 60.0
1280x800 59.8
1152x864 75.0
1280x720 60.0
1024x768 75.1 70.1 60.0
832x624 74.6
800x600 72.2 75.0 60.3 56.2
640x480 75.0 66.7 60.0 59.9
720x400 70.1
HDMI2 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
First one is my Laptop-screen. The other 2 screen are attached by Displayport and HDMI. This setup works on windows, so the hardware should not be a problem.
I'm using Ubuntu 14.04.1 LTS with stock 3.13.0-44 and default intel graphic driver from the distribution. Has anybody an idea how to debug this problem?
My Windows-setup is here.