Configuring alsa-utils
Config files
/etc/asound.state
Configuration Information
Probably the easiest way to store mixer levels is to set and retrieve
them using a bootscript. It is possible to do this with a
post-install line in
/etc/modules.conf but this is left as an exercise for
those readers who wish to do this.
The alsa-drivers package installs a script as
/etc/rc.d/init.d/alsasound. While it is possible to use
this script, it contains a lot of extraneous detail which isn't needed on an
LFS system and so we create our own script
/etc/rc.d/init.d/alsa.
To create the alsa script, do the following:
cat > /etc/rc.d/init.d/alsa << "EOF"
#!/bin/sh
# Begin $rc_base/init.d/alsa
# Based on sysklogd script from LFS-3.1 and earlier.
# Rewritten by Gerard Beekmans - gerard@linuxfromscratch.org
# ALSA specific parts by Mark Hymers - markh@linuxfromscratch.org
# Stores mixer settings in the default location: /etc/asound.state
source /etc/sysconfig/rc
source $rc_functions
case "$1" in
start)
echo "Starting alsa... Restoring volumes..."
loadproc /usr/sbin/alsactl restore
#echo " Loading MIDI font..."
#loadproc sfxload /path/to/soundfont
;;
stop)
echo "Stopping alsa... Saving volumes......"
loadproc /usr/sbin/alsactl store
#echo " Removing MIDI font.........."
#loadproc sfxload -i
;;
restart)
$0 stop
/usr/bin/sleep 1
$0 start
;;
*)
echo "Usage: $0 {start|stop|restart}"
exit 1
;;
esac
# End $rc_base/init.d/alsa
EOF
chmod 755 /etc/rc.d/init.d/alsa
You can then create the appropriate symlinks:
cd /etc/rc.d/init.d &&
ln -sf ../init.d/alsa ../rc0.d/K35alsa &&
ln -sf ../init.d/alsa ../rc1.d/K35alsa &&
ln -sf ../init.d/alsa ../rc2.d/S40alsa &&
ln -sf ../init.d/alsa ../rc3.d/S40alsa &&
ln -sf ../init.d/alsa ../rc4.d/S40alsa &&
ln -sf ../init.d/alsa ../rc5.d/S40alsa &&
ln -sf ../init.d/alsa ../rc6.d/K35alsa
Note that all channels of your soundcard are muted by default. You can
use the alsamixer program from alsa-utils (or any other
OSS mixer) to change this.
Also, the first time the above script is run, it will complain that
there is no state in /etc/asound.state. You can
prevent this by running the following commands after installing alsa-utils:
touch /etc/asound.state &&
alsactl store
A final note is that the lines loading sfxload
are commented out. They are there as an example of other things you may
wish to do in the startup script. sfxload is a
separate package of interest to SoundBlaster AWE and Live! users. It is
designed for loading "sound-fonts" (which are used for MIDI output). You
may wish to delete these lines and add your own or, if you have the relevant
soundcard, install sfxload and uncomment them.