nicomachus@nicomachus:~$ xrandr --current
Screen 0: minimum 64 x 64, current 1680 x 946, maximum 32766 x 32766
VGA-0 connected primary 1680x946+0+0 0mm x 0mm
   1680x946       60.0*+
   2560x1600      60.0  
   2560x1440      60.0  
   2048x1536      60.0  
   1920x1600      60.0  
   1920x1080      60.0  
   1600x1200      60.0  
   1680x1050      60.0  
   1400x1050      60.0  
   1280x1024      60.0  
   1024x768       60.0  
   800x600        60.0  
   640x480        60.0