Hy,
I reported oldest time similar issue with Lucid related, and this
problem affects too with Oneiric.
I see similar issue for a Nvidia sound card and lot of Intel N10 type
sound card, but different volume meters.
Look following bugreport, I attached patches with Lucid and Oneiric
branches for alsa-utils package:
https://bugs.launchpad.net/bugs/564472
I tested a patched alsa-utils package containing live CD some machines
with producing muting issues, and this problems are resolved if the live
CD containing the patched alsa-utils package.
I doed my test with six different configurations with producing muting
issues.
Christopher reported issue is little different, I think only the
'IEC958',0 playback switch default turned off.
I not see other playback channels Christopher attached amixer values
with values are 0 or the status are off.
Attila
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