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updated alsa restore script for new udev

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git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@5037 af4574ff-66df-0310-9fd7-8a98e5e911e0
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DJ Lucas 2005-09-10 02:22:41 +00:00
parent 3988b2bf58
commit a40efd2c13
1 changed files with 45 additions and 60 deletions
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105
multimedia/libdriv/alsa-utils.xml
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@ -111,7 +111,7 @@ make</userinput></screen>
You can use the <command>alsamixer</command> program from the You can use the <command>alsamixer</command> program from the
<application>ALSA Utilities</application> to change this.</para> <application>ALSA Utilities</application> to change this.</para>
<para>The first time the <filename class='directory'>dev.d</filename> <para>The first time the <filename>alsa-restore</filename>
script below is run, it will complain script below is run, it will complain
that there is no state in <filename>/etc/asound.state</filename>. that there is no state in <filename>/etc/asound.state</filename>.
You can prevent this by running the following commands as You can prevent this by running the following commands as
@ -121,73 +121,58 @@ make</userinput></screen>
alsactl store</userinput></screen> alsactl store</userinput></screen>
<para>The volume settings will be restored from the saved state using a <para>The volume settings will be restored from the saved state using a
<filename class='directory'>dev.d</filename> handler script that will shell script called by <application>Udev</application> that will
execute when the device is detected execute when the device is detected (during boot or when plugged in for
during boot (when plugged in for USB devices).</para> USB devices).</para>
<note>
<para>For versions of udev greater than 0.58, this script will
not work by default. You'll have to add dev.d compatibility by adding
a udev rules file that contains the line
'RUN="/sbin/udev_send_devd" to continue using the now depreciated
dev.d system.</para>
</note>
<para> While still the <para> While still the
<systemitem class="username">root</systemitem> user, create the <systemitem class="username">root</systemitem> user, create the
<filename class='directory'>dev.d</filename> script with the following <filename>/etc/udev/scripts/alsa-restore</filename> script with
commands:</para> the following commands:</para>
<screen role="root"><userinput>install -v -d -m755 /etc/dev.d/snd &amp;&amp; <screen role="root"><userinput>install -v -d -m754 /etc/udev/scripts &amp;&amp;
cat &gt; /etc/dev.d/snd/alsa.dev &lt;&lt; "EOF" cat &gt; /etc/udev/scripts/alsa-restore &lt;&lt; "EOF"
#!/bin/sh -e #!/bin/sh -e
# This script is called by udevd when a change in a device is # Begin /etc/udev/scripts/alsa-restore
# detected, including initial detection upon bootup. # $1 is (the numbered device "%n") passed in by udev/kernel.
# udevd sets the environment variables ACTION and DEVNAME.
[ "$ACTION" = "add" ] || exit 0
DEV_BASENAME="${DEVNAME##*/}"
N="${DEV_BASENAME#controlC}"
case "$DEV_BASENAME" in
controlC[0-7])
x=0
while [ $x -lt 20 ]; do
# Wait up to 20 seconds for /usr to be mounted if necessary
if [ -f /usr/sbin/alsactl ]; then
/usr/sbin/alsactl restore $N
exit 0
fi
sleep 1
x=`expr $x + 1`
done &amp; # Put the while command in the background and continue
;;
esac
exit 0
EOF
chmod -v 755 /etc/dev.d/snd/alsa.dev</userinput></screen>
<para>You may wish to do additional configuration on a per card basis.
For example, if you wish to load soundfont banks, use the following
sample script:</para>
<screen>#!/bin/sh -e
# Begin /etc/dev.d/snd/<replaceable>[DEVICE]</replaceable>/asfxload.dev
x=0 x=0
while [ $x -lt 20 ]; do
# Wait up to 20 seconds for /usr to be mounted if necessary
if [ -f /usr/bin/asfxload ]; then
# Load 8 MB sountfont bank
/usr/bin/asfxload /usr/share/sounds/sf2/8mbgmsfx.sf2 -D "<replaceable>[ALSA device string]</replaceable>"
exit 0
fi
sleep 1
x=`expr $x + 1`
done &amp; # Put the while command in the background and continue
exit 0 # Give up to 20 seconds for /usr to be mounted
# End /etc/dev.d/snd/<replaceable>[DEVICE]</replaceable>/asfxload.dev</screen> while [ "${x}" -lt 20 ]
do
sleep 1
if [ -f /usr/sbin/alsactl ]; then
/usr/sbin/alsactl restore "${1}"
exit 0
fi
x=`expr "${x}" + 1`
done &amp; # Put the loop in the background
# End /etc/udev/scripts/alsa-restore
EOF
chmod -v 754 /etc/udev/scripts/alsa-restore</userinput></screen>
<para>Finally, again as the
<systemitem class="username">root</systemitem> user, install a new
<application>Udev</application> rules file to create the audio
device nodes and run the restore script:</para>
<screen role="root"><userinput>cat &gt; /etc/udev/rules.d/15-alsa.rules &lt;&lt; "EOF"
# Give the audio group ownership of sound devices
SUBSYSTEM=="sound", GROUP="audio"
SUBSYSTEM=="snd", GROUP="audio"
# ALSA Devices
# When a sound device is detected, restore the volume settings
KERNEL=="controlC[0-9]*", ACTION=="add", NAME="snd/%k", RUN="/etc/udev/scripts/alsa-restore %n"
KERNEL="hw[CD0-9]*", NAME="snd/%k"
KERNEL="pcm[CD0-9cp]*", NAME="snd/%k"
KERNEL="midiC[D0-9]*", NAME="snd/%k"
KERNEL="timer", NAME="snd/%k"
KERNEL="seq", NAME="snd/%k"
EOF
chmod 644 /etc/udev/rules.d/15-alsa.rules</userinput></screen>
</sect3> </sect3>