Here is my updated /etc/rc.localfor Ubuntu 14.10
#!/bin/sh -e
# Sleep so all services have started before we change settings
sleep 5
# Set Intel Audio to power save
echo '1' > '/sys/module/snd_hda_intel/parameters/power_save';
# Temp disable ethernet port
modprobe -r r8169
# Wireless Power Saving for interface wlan0
iw dev wlan0 set power_save on
# VM writeback timeout
echo '1500' > '/proc/sys/vm/dirty_writeback_centisecs';
# Temp disable bluetooth
modprobe -r btusb
# Adjust backlight to start much lower
echo 800 > '/sys/class/backlight/intel_backlight/brightness'
# - NMI Watchdog (turned off)
echo 0 > '/proc/sys/kernel/nmi_watchdog';
# - SATA Active Link Power management
for i in `find /sys/class/scsi_host/*/link_power_management_policy`; do echo 'min_power' > $i; done;
# - USB Autosuspend (after 2 secs of inactivity)
for i in `find /sys/bus/usb/devices/*/power/control`; do echo auto > $i; done;
for i in `find /sys/bus/usb/devices/*/power/autosuspend`; do echo 2 > $i; done;
# - Device Power Management
echo 'auto' | tee /sys/bus/i2c/devices/*/power/control > /dev/null;
echo 'auto' | tee /sys/bus/pci/devices/*/power/control > /dev/null;
# - CPU Scaling (power saving scaling governor for all CPU's
for i in `find /sys/devices/system/cpu/*/cpufreq/scaling_governor`; do echo 'powersave' > $i; done;
exit 0