powersave

#!/bin/bash

# aspm
echo powersave > /sys/module/pcie_aspm/parameters/policy

#Disable nmi_watchdog
echo 0 > /proc/sys/kernel/nmi_watchdog

# remount noatime
for dev in $(awk '/^\/dev\/sd/ {print $1}' /etc/mtab); do mount -o remount,noatime,commit=600 $dev; done

#GPU powersave
#echo low > /sys/class/drm/card0/device/power_profile

#Screen brightness
echo "8" > /sys/class/backlight/acpi_video0/brightness

#USB powersave
for i in `find /sys/bus/usb/devices/*/power/level`; do echo auto > $i; done;
for i in `find /sys/bus/usb/devices/*/power/autosuspend`; do echo 15 > $i; done;

# Disk powersave
hdparm -B 128 -S 12 /dev/sda

#Soundcard powersave
echo 1 > /sys/module/snd_hda_intel/parameters/power_save
echo Y > /sys/module/snd_hda_intel/parameters/power_save_controller

# Keep dirty writes in memory
echo 90 > /proc/sys/vm/dirty_ratio &
# Keep dirty writes out of cache
echo 1 > /proc/sys/vm/dirty_background_ratio &
# Writeback 60 secs
echo 6000 > /proc/sys/vm/dirty_writeback_centisecs &

#Runtime Power Management
for i in `find /sys/devices/*/power/control`; do echo auto > $i; done;

#PCI devices
for i in $(ls /sys/bus/pci/devices/*/power/control);do echo auto > $i;done

#SATA Active Link Powermanagement
echo min_power > /sys/class/scsi_host/host0/link_power_management_policy