Subversion Repositories oBacklight

#!/bin/bash

#####################################################################
# Simple script to catch the changes to backlight events on sony    #
# in combination with nvidiabl.                                     #
#                                                                   #
# Tested with a Sony Vaio VPCCW1S1E Laptop.                         #
#                                                                   #
# This has been tested on openSUSE 11.2, 11.3 & 11.4 and            #
# Ubuntu 11.10 but should work on any distributions.                #
#                                                                   #
# Released under the BSDL Licens                                    #
#                                                                   #
# Developer: oSource Development                                    #
# DevTeam: Marcus Uddenhed                                          #
# Version: 0.3.9                                                    #
#                                                                   #
# Web: http://dev.osource.se/software/obacklight/                   #
# Rss: http://dev.osource.se/category/obacklight/feed/              #
#                                                                   #
# Last Updated: 2012-04-13 20:08                                    #
#                                                                   #
#####################################################################

### BEGIN INIT INFO
# Provides:          oBacklight
# Required-Start:    $acpid
# Required-Stop:
# Default-Start:     5
# Default-Stop:      0 1 2 3 6
# Short-Description: Provides a backlight event handler for nvidiabl
# Description:       Captures all backlight events from ACPI Events and feeds them to nvidiabl.
### END INIT INFO

init() {
## Default parameters
BMT="1"                 # Set Brightness Mode Types.
                        # Available types: 1, 2, 3, 4

ACPIS="1"               # Set correct System ACPI codes.
                        # Available settings: 1, 2, 3

## Various brightness modes
# Mode 1 (Default)
if [ "$BMT" == "1" ]
then
  BBL="2"               # Default brightness level when on battery.
  DID="1"               # The amount of steps to increase/decrease with on backlight changes.
  MBV="7"               # Max brightness value possible on your system.
fi
# Mode 2
if [ "$BMT" == "2" ]
then
  BBL="40"
  DID="10"
  MBV="127"
fi
# Mode 3
if [ "$BMT" == "3" ]
then
  BBL="4"
  DID="1"
  MBV="32"
fi
# Mode 4
# Tested on a VPCCW15FL, thanks to Esteban
if [ "$BMT" == "4" ]
then
  BBL="40"
  DID="17"
  MBV="120"
fi

## ACPI Codes for various systems.

# ACPIS 1(Default)
# Works on some Sony Vaio VPCCW1S1E 
if [ "$ACPIS" == "1" ]
then
  ACBU="00000001 00000011"      # ACPI brightness up event
  ACBD="00000001 00000010"      # ACPI brightness down event
  ACOB="00000081 00000000"      # ACPI brightness on battery event
fi
# ACPIS 2
# Works on some Sony Vaio VPCCW1S1E 
if [ "$ACPIS" == "2" ]
then
  ACBU="00000086 00000000"
  ACBD="00000087 00000000"
  ACOB="00000081 00000000"
fi
# ACPIS 3
# Works on Dell Vostro 3700
if [ "$ACPIS" == "3" ]
then
  ACBU="00000086 00000000"
  ACBD="00000087 00000000"
  ACOB="00000080 00000000"
fi

# Set correct values in configuration files on startup
echo "$MBV" > /sys/class/backlight/nvidia_backlight/brightness
echo "$MBV" > /root/oBacklight.def

# Check if oBacklight.def exists
if [ ! -e "/root/oBacklight.def" ]
 then
  echo "$MBV" > /root/oBacklight.def
fi
}

start() {

/etc/init.d/oBacklight run &

}

stop() {

echo $(cat /sys/class/backlight/nvidia_backlight/brightness) > /root/oBacklight.def
killall -r oBacklight

}

run() {
while [ exit != 130 ]
do

GVAR=$(cat /sys/class/backlight/nvidia_backlight/brightness)

CMD=$(acpi_listen -c 1 | egrep -o " [0-9].+" | egrep -o "[0-9].+")

# Brightness down acpi event
if [ "$CMD" == "$ACBD" ]
 then

  if [ "$GVAR" -ge "$DID" ] # Thanks to damdim @ nvnews forum for this fix.
   then
    SVAR=$(($GVAR - $DID))
    echo $SVAR > /sys/class/backlight/nvidia_backlight/brightness
    echo $SVAR > /root/oBacklight.def
   else
    SVAR="0"
    echo $SVAR > /sys/class/backlight/nvidia_backlight/brightness
    echo $SVAR > /root/oBacklight.def
  fi

fi

# Brightness up acpi event
if [ "$CMD" == "$ACBU" ]
 then
  if [ "$GVAR" -le $(($MBV-$DID)) ] # Thanks to damdim @ nvnews forum for this fix.
   then
    SVAR=$(($GVAR + $DID))
    echo $SVAR > /sys/class/backlight/nvidia_backlight/brightness
    echo $SVAR > /root/oBacklight.def
   else
    SVAR=$MBV
    echo $SVAR > /sys/class/backlight/nvidia_backlight/brightness
    echo $SVAR > /root/oBacklight.def
  fi
fi

# AC to battery change
if [ "$CMD" == "$ACOB" ]
 then
  if [ "$GVAR" > "$BBL" ]
   then
    echo $BBL > /sys/class/backlight/nvidia_backlight/brightness
    echo $BBL > /root/oBacklight.def
  fi
fi

done
}

case $1 in
start)
start
;;
stop)
stop
;;
run)
init
run
;;
*)
echo "start|stop|run"
;;
esac