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#!/bin/sh
# Allow the driver to put the audio hardware to sleep
# once the driver has been inactive for a second.
# This hook should work with at least the ac97 and hda codecs.
INTEL_AUDIO_POWERSAVE=${INTEL_AUDIO_POWERSAVE:-true}
help() {
cat <<EOF
--------
$0: Intel Audio powersave parameters.
This hook has 1 tuneable parameter.
INTEL_AUDIO_POWERSAVE = controls whether we will try to save power on battery.
Defaults to true.
EOF
}
audio_powersave() {
[ "$INTEL_AUDIO_POWERSAVE" = "true" ] || exit $NA
for dev in /sys/module/snd_*/parameters/power_save; do
[ -w "$dev/parameters/power_save" ] || continue
printf "Setting power savings for $s to %d..." "$dev##*/" "$1"
echo $1 > "$dev/parameters/power_save" && echo Done. || echo Failed.
done
}
case $1 in
true) audio_powersave 1 ;;
false) audio_powersave 0 ;;
help) help;;
*) exit $NA
esac
exit 0
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