Low Power Boot

From Sfvlug

A simple little snippet to add to rc.local (or your distribution's equivalent of post-SYSV start up script) that will help conserve power when booting up in battery mode.

# Haxx to lower power usage when booting up on battery.
BATSTATE=`cat /proc/acpi/battery/BAT0/state | grep charging | awk -F: '{print $2}'`
if [ "$BATSTATE" == "discharging" ]; then

       # If we get here, we're on battery.
       # Throttle the CPU
       echo 4 > /proc/acpi/processor/CPU/throttling

       # Go into laptop mode..
       echo 1 > /proc/sys/vm/laptop_mode

       # Remove wireless (and any other unnecessary) driver
       for i in ipw2100; do
               rmmod ${i}
       done
fi