#!/bin/bash

export DISPLAY=:0
BRIGHT=$(echo "scale=2; $1/100" | bc)
for XRANDR_DEV in `xrandr --query | grep " connected " | sed 's/ connected.*//g'`
do
 xrandr --output $XRANDR_DEV --brightness $BRIGHT
done
#intel backlight brightness range is 0 - 96000
# Don't allow completly black screen, so set minimal value to 10000
BRIGHT=$(( 10000+$1*860))
echo $BRIGHT > /sys/class/backlight/intel_backlight/brightness
