Power optimization script for the Lenovo Ideapad Z370a

z370Power

#!/bin/sh


# Power optimization script for the Lenovo Ideapad Z370a. Written by Chris Mavrakis (cmavr8@gmail.com).
# Place in /usr/lib/pm-utils/power.d and make executable.

case $1 in
    false) # On AC power!

	# Intel HD audio power management:
	echo N > /sys/module/snd_hda_intel/parameters/power_save_controller 
	#echo 1 > /sys/module/snd_hda_intel/parameters/power_save

	# Wifi high power mode:
	iwconfig wlan0 txpower 19dbm

	# VM Dirty writeback: If laptop tools doesnt take care of this, uncomment:
	echo 500 > /proc/sys/vm/dirty_writeback_centisecs
	;;


    true) # On battery power!
	
	# Intel HD audio power management:
        echo Y > /sys/module/snd_hda_intel/parameters/power_save_controller
	#echo 10 > /sys/module/snd_hda_intel/parameters/power_save

	# Wifi low power mode:
        iwconfig wlan0 txpower 0dbm

	# VM Dirty writeback: If laptop tools doesnt take care of this, uncomment:
	echo 1500 > /proc/sys/vm/dirty_writeback_centisecs
	;;
esac