Comment 7 for bug 2064196

Actually xrandr show 3 displays:

Screen 0: minimum 8 x 8, current 5760 x 1080, maximum 16384 x 16384
DVI-I-0 disconnected (normal left inverted right x axis y axis)
DVI-I-1 disconnected (normal left inverted right x axis y axis)
HDMI-0 disconnected (normal left inverted right x axis y axis)
DP-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 477mm x 268mm panning 3840x1080+0+0 tracking 5760x1080+0+0 border 0/0/0/0
   1920x1080 60.00*+ 59.94 50.00 60.00 50.04
   1680x1050 59.95
   1440x900 74.98 59.89
   1440x576 50.00
   1280x1024 75.02 60.02
   1280x960 60.00
   1280x720 60.00 59.94 50.00
   1152x864 75.00
   1024x768 75.03 70.07 60.00
   800x600 75.00 60.32 56.25
   720x576 50.00
   720x480 59.94
   640x480 75.00 72.81 59.94 59.93
DVI-D-0 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 510mm x 287mm panning 3840x1080+1920+0 tracking 5760x1080+0+0 border 0/0/0/0
   1920x1080 60.00*+
   1680x1050 59.95
   1440x900 74.98 59.89
   1280x1024 75.02 60.02
   1280x720 60.00
   1024x768 75.03 60.00
   800x600 75.00 60.32
   640x480 75.00 72.81 59.94
DP-1 disconnected (normal left inverted right x axis y axis)
None-1-1 connected (normal left inverted right x axis y axis)
   1920x1080 60.00 +