Computer Science Mojo

Enable extra monitors or dual screens for Debian xfce in VirtualBox

1. Enable extra monitors in VirtualBox settings

Change the monitor count

2. Enable Virtual Screen

After running the vitural machine, enable the second screen

3. Enalbe xfce display settings

Go to display and click "Use this output"

4. Change duplicate to extend using xrandr

• The defualt is duplicate screens
• To change to extend, run xrandr to list the two monitors
• Run the following with the monitor names and position flag

xrandr --output VGA-0 --left-of VGA-1

• Position flags from man xrandr:

--left-of, --right-of, --above, --below, --same-as another-output
      Use one of these options to position the output relative to the  position  of
      another  output.  This allows convenient tiling of outputs within the screen.
      The position is always computed relative to the new  position  of  the  other
      output, so it is not valid to say --output a --left-of b --output b --left-of
      a.