xrandr -q

tomas@Saturn:~$ xrandr -q
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 320 x 400, current 800 x 600, maximum 800 x 600
default connected 800x600+0+0 0mm x 0mm
   800x600         0.0*
   640x480        60.0
   640x400         0.0
   320x400         0.0
tomas@Saturn:~$