andrea@centurion:~$ xrandr -q
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 320 x 240, current 1024 x 768, maximum 1024 x 768
default connected 1024x768+0+0 0mm x 0mm
   1024x768       50.0* 
   800x600        51.0     52.0     53.0  
   680x384        54.0     55.0  
   640x480        56.0  
   512x384        57.0  
   400x300        58.0  
   320x240        59.0