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git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@1630 af4574ff-66df-0310-9fd7-8a98e5e911e0
104 lines
3.7 KiB
XML
104 lines
3.7 KiB
XML
<sect2>
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<title>Configuring <application><acronym>ALSA</acronym> Utilities</application></title>
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<sect3><title>Config files</title>
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<para><filename>/etc/asound.state</filename></para>
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</sect3>
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<sect3><title>Configuration Information</title>
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<para>Probably the easiest way to store mixer levels is to set and retrieve
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them using a bootscript. It is possible to do this with a
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<userinput>post-install</userinput> line in
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<filename>/etc/modules.conf</filename> but this is left as an exercise for
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those readers who wish to do this.</para>
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<para>The <application><acronym>ALSA</acronym> Driver</application> package
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installs a script as <filename>/etc/rc.d/init.d/alsasound</filename>. While it
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is possible to use this script, it contains a lot of extraneous detail which
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isn't needed on an <acronym>LFS</acronym> system and so we create our own
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script <filename>/etc/rc.d/init.d/alsa</filename>.</para>
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<para>To create the <application><acronym>ALSA</acronym></application> script, do the following:</para>
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<screen><userinput><command>cat > /etc/rc.d/init.d/alsa << "EOF"</command>
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#!/bin/sh
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# Begin $rc_base/init.d/alsa
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# Based on sysklogd script from LFS-3.1 and earlier.
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# Rewritten by Gerard Beekmans - gerard@linuxfromscratch.org
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# ALSA specific parts by Mark Hymers - markh@linuxfromscratch.org
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# Stores mixer settings in the default location: /etc/asound.state
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source /etc/sysconfig/rc
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source $rc_functions
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case "$1" in
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start)
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echo "Starting ALSA... Restoring volumes..."
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loadproc /usr/sbin/alsactl restore
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#echo " Loading MIDI font..."
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#loadproc sfxload /path/to/soundfont
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;;
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stop)
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echo "Stopping ALSA... Saving volumes......"
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loadproc /usr/sbin/alsactl store
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#echo " Removing MIDI font.........."
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#loadproc sfxload -i
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;;
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restart)
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$0 stop
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/bin/sleep 1
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$0 start
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;;
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*)
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echo "Usage: $0 {start|stop|restart}"
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exit 1
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;;
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esac
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# End $rc_base/init.d/alsa
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<command>EOF
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chmod 755 /etc/rc.d/init.d/alsa</command></userinput></screen>
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<para>You can then create the appropriate symlinks:</para>
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<screen><userinput><command>cd /etc/rc.d/init.d &&
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ln -sf ../init.d/alsa ../rc0.d/K35alsa &&
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ln -sf ../init.d/alsa ../rc1.d/K35alsa &&
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ln -sf ../init.d/alsa ../rc2.d/S40alsa &&
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ln -sf ../init.d/alsa ../rc3.d/S40alsa &&
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ln -sf ../init.d/alsa ../rc4.d/S40alsa &&
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ln -sf ../init.d/alsa ../rc5.d/S40alsa &&
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ln -sf ../init.d/alsa ../rc6.d/K35alsa</command></userinput></screen>
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<para>Note that all channels of your soundcard are muted by default. You can
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use the <command>alsamixer</command> program from
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<application><acronym>ALSA</acronym> Utilities</application> (or any other
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<acronym>OSS</acronym> mixer) to change this.</para>
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<para>Also, the first time the above script is run, it will complain that
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there is no state in <filename>/etc/asound.state</filename>. You can
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prevent this by running the following commands after installing
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<application><acronym>ALSA</acronym> Utilities</application>:</para>
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<screen><userinput><command>touch /etc/asound.state &&
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alsactl store</command></userinput></screen>
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<para>A final note is that the lines loading <filename>sfxload</filename>
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are commented out. They are there as an example of other things you may
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wish to do in the startup script. <filename>sfxload</filename> is a
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separate package of interest to SoundBlaster AWE and Live!
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users. It is designed for loading "sound-fonts" (which are used for
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<acronym>MIDI</acronym> output). You may wish to delete these lines and add
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your own or, if you have the relevant soundcard, install <filename>sfxload
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</filename> and uncomment them.</para>
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</sect3>
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</sect2>
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