I am positive amixer -c $1 scontrols does what I intend (which is to
dump that card's enumerated simple controls).
At this point, I am unlikely to find any alsa-utils tool as the culprit,
particularly since the entire sequence works without delay (i.e., as
expected/normally) on many machines /and/ does not manifest the reported
symptom when invoked during an interactive session /not/ associated with
shutdown/rebooting. The chronological proximity of the reported symptom
to network-related teardown does not seem coincidental.
** Changed in: alsa-utils (Ubuntu)
Status: In Progress => Confirmed
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shutdown freeze on alsa shutdown
https://bugs.launchpad.net/bugs/274995
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