Just a note: I see others with imac18,1 models were also struggling with
audio: https://bbs.archlinux.org/viewtopic.php?id=233449=2
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https://bugs.launchpad.net/bugs/1897487
Title:
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Bug reporting is mostly about finding & fixing problems thus preventing
future users from hitting the same bug.
I suspect a Support site would be more appropriate, eg.
https://answers.launchpad.net/ubuntu. You
