Samsung Series 9 Power Savings

rc.local

#!/bin/sh
echo "noop" > /sys/block/sda/queue/scheduler
echo 5 > /proc/sys/vm/laptop_mode
echo 0 > /proc/sys/kernel/nmi_watchdog
echo 1 > /sys/devices/system/cpu/sched_mc_power_savings
for i in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor; do echo ondemand > $i; done
echo 1500 > /proc/sys/vm/dirty_writeback_centisecs
for i in /sys/bus/usb/devices/*/power/autosuspend; do echo 1 > $i; done
for i in /sys/class/scsi_host/host*/link_power_management_policy; do echo min_power > $i; done

echo 24 > /sys/class/backlight/acpi_video0/brightness

exit 0

For this to work in Fedora 16 the first line needs to be

#!/bin/bash

Otherwise you get errors on system start

Ah yes, sorry. Fedora 17 moved everything to /usr/bin.