root@debian:~# xrandr
Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 16384 x 16384
HDMI-0 disconnected (normal left inverted right x axis y axis)
DVI-0 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 477mm x 268mm
   1920x1080     60.00*+
   1280x1024     60.02
   1440x900      59.90
   1280x800      59.91
   1152x864      75.00
   1024x768      70.07    60.00
   800x600       60.32    56.25
   640x480       66.67    60.00
   720x400       70.08
VGA-0 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 598mm x 337mm
   1920x1080     60.00*+
   1680x1050     59.95
   1400x1050     59.98
   1600x900      59.98
   1280x1024     75.02    60.02
   1440x900      59.89
   1280x800      59.81
   1152x864      75.00
   1280x720      59.97
   1024x768      75.08    60.00
   800x600       75.00    60.32
   640x480       75.00    60.00
   720x400       70.08