xrandr

Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 8192 x 8192
DisplayPort-0 disconnected (normal left inverted right x axis y axis)
HDMI-0 disconnected (normal left inverted right x axis y axis)
DVI-0 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 338mm x 270mm
   1280x1024      60.0*+   75.0     60.0*
   1400x1050      60.0     60.0
   1440x900       75.0     59.9
   1280x960       60.0
   1360x768       60.0
   1280x800       74.9     59.8
   1152x864       75.0
   1280x768       74.9     59.9
   1024x768       75.1     75.0     70.1     60.0
   832x624        74.6
   800x600       130.0    120.0     72.2     75.0     60.3     56.2
   848x480        60.0
   700x525       149.5    120.0
   640x512       150.0    120.0
   640x480       120.0     75.0     72.8     72.8     72.8     75.0     66.7     60.0     59.9     59.9
   720x400        70.1
   576x432       150.0
   512x384       150.1    140.1    120.0
   416x312       149.3
   400x300       144.4    150.2    120.6    112.7
   320x240       145.6    150.0    120.1
DVI-1 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 510mm x 290mm
   1920x1080      60.0 +
   1680x1050      60.0
   1280x1024      75.0     60.0*
   1280x960       60.0
   1152x864       75.0
   1024x768       75.1     60.0
   832x624        74.6
   800x600        75.0     60.3     56.2
   640x480        75.0     60.0
   720x400        70.1