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