andrea@helicon:~$ xrandr -q
Screen 0: minimum 8 x 8, current 1680 x 1050, maximum 8192 x 8192
VGA-0 connected primary 1680x1050+0+0 (normal left inverted right x axis y axis) 474mm x 296mm
   1680x1050      60.0*+
   1600x1200      60.0  
   1440x900       75.0     59.9  
   1400x1050      60.0  
   1360x765       60.0  
   1280x1024      75.0  
   1280x960       60.0  
   1152x864       75.0  
   1024x768       75.0     70.1     60.0  
   800x600        75.0     72.2     60.3     56.2  
   640x480        75.0     72.8     59.9  
LVDS-0 disconnected (normal left inverted right x axis y axis)
HDMI-0 disconnected (normal left inverted right x axis y axis)