blob: 3c1aa2c54d4bf69cc05b4e79650e01caa4709759 [file] [log] [blame]
#! /bin/sh
# Laptop mode tools module: Intel AC97 integrated audio power saving mode.
if [ x$CONTROL_AC97_POWER = x1 ] ; then
if [ -w /sys/module/snd_ac97_codec/parameters/power_save ]; then
echo 1 > /sys/module/snd_ac97_codec/parameters/power_save
log "VERBOSE" "AC97 power save mode enabled."
if [ -c /dev/dsp ]; then
# This can fail if the audio device is busy.
# Since this failure is non-fatal (worst case is that the timer changes
# don't get activated), we don't bother if it was successful or not
#(exec 2>/dev/null; echo 1 > /dev/dsp;)
# Better way
echo 1 2>/dev/null >/dev/dsp
log "VERBOSE" "Initialize timer change by close/open /dev/dsp"
log "VERBOSE" "AC97 power saving is not available. Perhaps CONFIG_SND_AC97_POWER_SAVE option"
log "VERBOSE" "is not set in the kernel config, or the snd_ac97_codec module is not loaded."
log "VERBOSE" "AC97 audio power setting is disabled."