Asus UL80vt Brightness workaround

gistfile1.sh

#!/bin/sh
# /etc/acpi/actions/backlight

#acpi_fakekey $KEY_BRIGHTNESSDOWN

# added per http://forum.notebookreview.com/showpost.php?p=5665108&postcount=1235
#brightness=`echo $3 | sed 's/0000002//'`
#setpci -s 00:02.0 F4.B=${brightness}f

# added per mailing-list post
STEP=0x16
DELAY=200000000

# Hacky Workaround to only use the first of the 4 fired events
LAST_RUN=`date --reference=/tmp/acpiBacklightTracker +%s%N 2> /dev/null`
if [ $? == 0 ]; then
  TIME_NOW=`date +%s%N`
  DIFF=$(($TIME_NOW - $LAST_RUN))
  if [ $DIFF -le $DELAY ]; then
    exit;
  fi
fi
touch /tmp/acpiBacklightTracker


case $1 in
  -)
    brightness=$((0x`setpci -s 00:02.0 F4.B` - $STEP));
    ;;
  +)
    brightness=$((0x`setpci -s 00:02.0 F4.B` + $STEP));
    ;;
  *)
    brightness=$1
esac

if [ $brightness -lt 0 ] ; then
   brightness=1;
fi
if [ $brightness -gt $((0xff)) ] ; then
  brightness=$((0xff));
fi
setpci -s 00:02.0 F4.B=`printf '%x' $brightness`;

gistfile2.sh

# /etc/acpi/events/brightnessup
event=video/brightnessup
action=/etc/acpi/actions/backlight +

gistfile3.sh

# /etc/acpi/events/brightnessdown
event=video/brightnessdown
action=/etc/acpi/actions/backlight -