kivy@kivy-VirtualBox:~$ xrandr
Screen 0: minimum 64 x 64, current 1024 x 768, maximum 32000 x 32000
VBOX0 connected 1024x768+0+0 0mm x 0mm
   1024x768       60.0*+   60.0*
   1600x1200      60.0
   1440x1050      60.0
   1280x960       60.0
   800x600        60.0
   640x480        60.0