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+#!/bin/sh
+# Load the mixer settings and OSS compatibility for ALSA.
+# (the Advanced Linux Sound Architecture)
+
+# A function to load the ALSA mixer settings:
+load_alsa_mixer() {
+ if [ -r /etc/asound.state ]; then
+ echo "Loading ALSA mixer settings: /usr/sbin/alsactl restore"
+ /usr/sbin/alsactl restore
+ else
+ # It's possible a user might not want to set a default sound state.
+ # In that case, do this: touch /etc/no.asound.state
+ if [ ! -r /etc/no.asound.state ]; then
+ echo "Setting default ALSA mixer settings."
+ # set default mixer volumes for ALSA
+ # Taken from the alsaconfig script.
+ amixer -s -q <<EOF
+set Master 75% unmute
+set Master -12dB
+set 'Master Mono' 75% unmute
+set 'Master Mono' -12dB
+set Front 75% unmute
+set Front -12dB
+set PCM 90% unmute
+set PCM 0dB
+mixer Synth 90% unmute
+mixer Synth 0dB
+mixer CD 90% unmute
+mixer CD 0dB
+# mute mic
+set Mic 0% mute
+# ESS 1969 chipset has 2 PCM channels
+set PCM,1 90% unmute
+set PCM,1 0dB
+# Trident/YMFPCI/emu10k1
+set Wave 100% unmute
+set Music 100% unmute
+set AC97 100% unmute
+# CS4237B chipset:
+set 'Master Digital' 75% unmute
+# Envy24 chips with analog outs
+set DAC 90% unmute
+set DAC -12dB
+set DAC,0 90% unmute
+set DAC,0 -12dB
+set DAC,1 90% unmute
+set DAC,1 -12dB
+# some notebooks use headphone instead of master
+set Headphone 75% unmute
+set Headphone -12dB
+set Playback 100% unmute
+# turn off digital switches
+set "SB Live Analog/Digital Output Jack" off
+set "Audigy Analog/Digital Output Jack" off
+EOF
+ echo "Storing default ALSA mixer settings: /usr/sbin/alsactl store"
+ /usr/sbin/alsactl store
+ fi
+ fi
+}
+
+# A function to load the ALSA OSS compat modules:
+load_alsa_oss_modules() {
+ if ! cat /proc/modules | tr _ - | grep -wq snd-pcm-oss ; then
+ echo "Loading OSS compatibility modules for ALSA."
+ modprobe snd-pcm-oss
+ modprobe snd-seq-oss
+ modprobe snd-mixer-oss
+ fi
+}
+
+# If hotplug or something else has loaded the ALSA modules, then
+# simply load the mixer settings and make sure the OSS compat
+# modules are loaded:
+if [ -d /proc/asound ]; then
+ load_alsa_oss_modules
+ load_alsa_mixer
+else
+ # If there are ALSA modules defined in /etc/modprobe.conf, but
+ # ALSA is not yet loaded, then load the modules now:
+ DRIVERS=$(modprobe -c | grep -E "^[[:space:]]*alias[[:space:]]+snd-card-[[:digit:]]" | tr -s "[[:blank:]]" " " | cut -d " " -f 3)
+ if [ ! "$DRIVERS" = "" ]; then
+ echo "Loading ALSA kernel modules."
+ for module in $DRIVERS; do
+ modprobe $module
+ done
+ fi
+ # If ALSA is now up, then load the mixer settings and OSS modules:
+ if [ -d /proc/asound ]; then
+ load_alsa_oss_modules
+ load_alsa_mixer
+ fi
+fi