bryan@osiris ~ $ xrandr -q
Screen 0: minimum 320 x 200, current 3600 x 1080, maximum 3600 x 1920
DFP1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 160mm x 90mm
   1680x1050      60.0 +
   1920x1080      60.0*+   50.0     30.0     25.0     24.0
   1776x1000      60.0 +   50.0     30.0     25.0     24.0
   1600x1200      60.0
   1400x1050      60.0
   1280x1024      75.0     60.0
   1440x900       59.9
   1280x960       60.0
   1280x800       60.0
   1152x864       75.0     60.0
   1280x768       59.9
   1280x720       60.0     50.0
   1024x768       75.0     70.1     60.0
   1152x648       60.0     50.0
   800x600        72.2     75.0     60.3     56.2     50.0
   720x576        50.0     25.0
   720x480        59.9     50.0
   640x480        75.0     72.8     60.0     50.0
DFP2 connected 1680x1050+1920+0 (normal left inverted right x axis y axis) 474mm x 296mm
   1680x1050      59.9*+
   1400x1050      59.9 +
   1280x1024      59.9 +   75.0
   1440x900       59.9 +
   1280x960       59.9 +   75.0
   1280x800       59.9 +   75.0
   1152x864       59.9 +   75.0
   1280x768       59.9 +   74.9
   1280x720       59.9 +
   1024x768       59.9 +   75.0
   1152x648       59.9 +
   800x600        59.9 +   75.0     56.2
   720x480        59.9 +
   640x480        59.9 +   75.0
CRT1 disconnected (normal left inverted right x axis y axis)
CRT2 disconnected (normal left inverted right x axis y axis)
TV disconnected (normal left inverted right x axis y axis)
CV disconnected (normal left inverted right x axis y axis)