xrandr

Screen 0: minimum 8 x 8, current 2624 x 1200, maximum 32767 x 32767
LVDS1 connected primary 1600x1200+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1600x1200      60.0*+
VGA1 connected 1024x768+1600+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1024x768       60.0*
   800x600        60.3     56.2
   848x480        60.0
   640x480        59.9
VIRTUAL1 disconnected (normal left inverted right x axis y axis)