Ubuntu 12.04 省電力Script

power_save.sh

#!/bin/sh

date>/home/iberianpig/powersaved.txt
sleep 10
# Reduce power for SATA link power management
for i in 0 1 2 3 4 5 ; do
echo min_power>/sys/class/scsi_host/host${i}/link_power_management_policy
done
# Disable the NMI watchdog
echo 0 > /proc/sys/kernel/watchdog
# Enable Audio codec power management
echo Y > /sys/module/snd_hda_intel/parameters/power_save_controller
echo 1 > /sys/module/snd_hda_intel/parameters/power_save

# Autosuspend for USB device
for i in /sys/bus/usb/devices/*/power/autosuspend; do
echo 1 > $i;
done
for i in /sys/bus/usb/devices/*/power/level; do
echo auto > $i;
done
# Runtime power-management for PCI devices
for i in /sys/bus/pci/devices/*/power/control ; do
echo auto > ${i}
done


#echo 1 > /sys/devices/system/cpu/sched_mc_power_savings

iw dev wlan0 set power_save on;

echo 1500 > /proc/sys/vm/dirty_writeback_centisecs

echo 0 > /sys/class/backlight/intel_backlight/brightness