#!/bin/sh
#
# start of stop laptop mode, best run by a power management daemon when
# ac gets connected/disconnected from a laptop
#
# FIXME: assumes HZ == 100

# age time, in seconds. should be put into a sysconfig file
# The default value is 
MAX_AGE=600

# kernel default dirty buffer age
DEF_AGE=30
DEF_UPDATE=5

if [ ! -w /proc/sys/vm/laptop_mode ]; then
	echo "Kernel is not patched with laptop_mode patch"
	exit 1
fi

case "$1" in
	start)
		AGE=$((100*$MAX_AGE))
		echo -n "Starting laptop mode"
		echo "1" > /proc/sys/vm/laptop_mode
		echo "30 500 0 0 $AGE $AGE 60 20 0" > /proc/sys/vm/bdflush
		# if no AAM support, manually set spin down
		if [ ! -d /proc/aam/hda ]; then
		# Configuration Suggestion for the Contura Aero Laptop:
		# (see www.ulihansen.kicks-ass.net/aero/linux/apm.htm
		# for more info).
		# Use S4 for hdparm to spin down after 20 sec. and
		# also acivate disk-write-caching with W1.
		# maybe you want also activate PIO-Mode 4 (would be X12)
			hdparm -S4W1 /dev/hda
		else
			echo 1 > /proc/aam/hda/enabled
		fi
		echo "."
		;;
	stop)
		U_AGE=$((100*$DEF_UPDATE))
		B_AGE=$((100*$DEF_AGE))
		echo -n "Stopping laptop mode"
		echo "0" > /proc/sys/vm/laptop_mode
		echo "30 500 0 0 $U_AGE $B_AGE 60 20 0" > /proc/sys/vm/bdflush
		if [ ! -d /proc/aam/hda ]; then
			hdparm -S0 /dev/hda
		else
			echo 0 > /proc/aam/hda/enabled
		fi
		echo "."
		;;
	*)
		echo "$0 {start|stop}"
		;;

esac

exit 0