Confirmed in Gutsy with Intel 82801G (ICH7 Family) integrated sound card
(module snd_hda_intel).
I normally use GNOME with the volume applet active. PCM sound is
available on analog and optical output. After playing an AC3 stream the
PCM sound only plays on analog output, unless I explicitly specify spdif
as output device, such as "speaker-test -D spdif -c 2". This behavior
persists between reboots.
To get it to work again I have to stop all applications using sound and
then unload and reload the snd_hda_intel module by hand as long as the
computer has not rebooted.
As far as I can tell the /etc/init.d/alsa-utils script somehow interferes with
the settings... After a reboot a part of the /var/lib/alsa/asound.state file
was changed as follows:
Before DVD playback:
control.33 {
comment.access 'read write'
comment.type IEC958
comment.count 1
iface MIXER
name 'IEC958 Playback Default'
value '040000000000000000000000000000000000000000000000000000000
}
After reboot:
control.33 {
comment.access 'read write'
comment.type IEC958
comment.count 1
iface MIXER
name 'IEC958 Playback Default'
value '068200020000000000000000000000000000000000000000000000000
}
Hope this helps; this bug gets annoying somehow... ;-)
--
SPDIF won't play PCM after playing AC3
https://bugs.launchpad.net/bugs/25632
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