Dual-display screen adjust script

#!/bin/sh

# grab external monitor's name
xmonitor=$( xrandr | grep " connected" | grep VGA )

if [ -n "$xmonitor" ]; then
    # External monitor is connected

    # place VGA1 on top of laptop display
    xrandr --auto # power on the new monitor
    xrandr --output VGA1 --above LVDS1
    xrandr --output LVDS1 --primary
else
    # External monitor is not connected
    xrandr --output LVDS1 --mode 1920x1080 --output VGA1 --off
fi