Dualdflipflop at 06:08, 29 January 2007

Dualdflipflop — Mon, 29 Jan 2007 06:08:41 GMT

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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

Low Power Boot - Revision history

Dualdflipflop at 06:08, 29 January 2007