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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 /var/lib/alsa/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 /var/lib/alsa/no.asound.state
if [ ! -r /var/lib/alsa/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 modprobe -c | tr _ - | grep -wq snd-pcm-oss ; then
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
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.d/*, 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
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