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- #! /bin/sh
- #
- # Laptop mode tools module: Intel AC97 integrated audio power saving mode.
- #
-
- if [ x$CONTROL_AC97_POWER = x1 ] || [ x$ENABLE_AUTO_MODULES = x1 -a x$CONTROL_AC97_POWER = xauto ]; 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"
- fi
- else
- 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."
- fi
- else
- log "VERBOSE" "AC97 audio power setting is disabled."
- fi
-
-