#!/bin/bash
# VU8C backlight control

path="/sys/class/gpio"
cur_stat="On"

while true
do
sleep 1
stat=$(xset -q|sed -ne 's/^[ ]*Monitor is //p')

if [ "$stat" == "Off" -a "$cur_stat" == "On" ]; then
        echo "monitor goes to Off"
        # backlight off first 
        echo 1 > $path/gpio214/value
        cur_stat=$stat
elif [ "$stat" == "On" -a "$cur_stat" == "Off" ]; then
        echo "monitor turns back On"
        echo 0 > $path/gpio234/value
        # backlight on later
        echo 0 > $path/gpio214/value
        cur_stat=$stat
fi
done