Comment 22 for bug 1295267

I tried to run xrandr periodically and check what's going on while the screens are turned off. It turns out that the output doesn't change while screens go to sleep and eventually turn off.

My xrandr output:

Screen 0: minimum 8 x 8, current 5760 x 2160, 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 3840x2160+0+0 (normal left inverted right x axis y axis) 597mm x 336mm
   3840x2160 60.00*+ 29.98
   2560x1440 59.95
   1920x1200 59.88
   1920x1080 60.00 59.94 50.00 23.97 60.00 50.04
   1680x1050 59.95
   1600x1200 60.00
   1280x1024 75.02 60.02
   1280x800 59.81
   1280x720 60.00 59.94 50.00
   1152x864 75.00
   1024x768 75.03 60.00
   800x600 75.00 60.32
   720x576 50.00 50.08
   720x480 59.94 60.05
   640x480 75.00 59.94 59.93
DP-1 disconnected (normal left inverted right x axis y axis)
DVI-D-0 connected 1920x1080+3840+0 (normal left inverted right x axis y axis) 510mm x 290mm
   1920x1080 60.00*+
   1680x1050 59.95
   1280x1024 75.02 60.02
   1280x960 60.00
   1152x864 75.00
   1024x768 75.03 60.00
   800x600 75.00 60.32 56.25
   640x480 75.00 59.94