xrandr
Screen 0: minimum 320 x 200, current 1600 x 600, maximum 2240 x 900
VGA connected 800x600+800+0 (normal left inverted right x axis y axis) 410mm x 257mm
   1440x900       59.9 +   75.0     59.9
   1152x864       75.0     74.8
   1024x768       75.1     70.1     60.0
   832x624        74.6
   800x600        72.2*    75.0     60.3     56.2
   768x576       100.0     79.4
   800x480_120   120.0
   800x480_100   100.0
   800x480_85     85.0
   800x480_75     75.0
   800x480_60     60.0
   640x480        75.0     72.8     66.7     60.0
   720x400        70.1
LVDS connected 800x480+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   800x480        60.0*+
   640x480        85.0     72.8     75.0     59.9
   720x400        85.0
   640x400        85.1
   640x350        85.1