$ xrandr
Screen 0: minimum 8 x 8, current 640 x 480, maximum 16384 x 16384
LVDS-0 connected 640x480+0+0 (normal left inverted right x axis y axis) 309mm x 174mm
   640x480        59.9*
   320x240       120.1
VGA-0 connected 640x480+0+0 (normal left inverted right x axis y axis) 340mm x 270mm
   1280x1024      60.0 +   75.0
   1152x864       75.0
   1024x768       75.1     70.1     60.0
   832x624        74.6
   800x600        72.2     75.0     60.3
   640x480        72.8     75.0*    60.0
   720x400        70.1
HDMI-0 disconnected (normal left inverted right x axis y axis)
DisplayPort-0 disconnected (normal left inverted right x axis y axis)