#!/bin/bash
LVDSOUTPUT="$(xrandr | grep ' connected ' | cut -f1 -d' ' | grep LVDS)"
BEAMEROUTPUT="$(xrandr | grep ' connected ' | cut -f1 -d' ' | grep -v LVDS)"
 
DEFRESOLUTION="$(xrandr | grep LVDS -A 4 | egrep '\+$' | sed 's/^ *//' | cut -f1 -d' ')"
 
if [ -z "$BEAMEROUTPUT"  ]; then
  echo "Please connect Beamer"
  exit 1
fi
 
#display Beamer in Display Resolution
xrandr --addmode $BEAMEROUTPUT $DEFRESOLUTION
 
#add Beamer Resolution to Laptop Display
#xrandr --newmode 1024x600x60.0 60.00 1024 1488 1520 1600  600 903 909 912
#xrandr --addmode $BEAMEROUTPUT 1024x600x60.0
xrandr --newmode "1280x800@60" 83.91 1280 1312 1624 1656 800 816 824 841
xrandr --addmode $BEAMEROUTPUT "1280x800@60"
xrandr --addmode $LVDSOUTPUT "1280x800@60"
 
if [ -n "$1" ]; then
  gnome-display-properties &
else
  xrandr --output $BEAMEROUTPUT --mode $DEFRESOLUTION --same-as $LVDSOUTPUT
fi