Seems the mystery was solved: The beeping seems to be caused by brltty.
The init.d script reads /etc/default/brltty which has "RUN_BRLTTY=no",
so we never actually run this by default. But the systemd unit does
start it. Apparently brltty produces the beeps as a kind of notification
to blind users, so it sounds plausible that this is deliberate.
So I think what we should do here is to make the systemd unit respect
the default file.
** Package changed: systemd (Ubuntu) => brltty (Ubuntu)
** Changed in: brltty (Ubuntu)
Status: Confirmed => Triaged
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https://bugs.launchpad.net/bugs/1316804
Title:
loud pc-speaker like beep when rebooting under systemd
Status in “brltty” package in Ubuntu:
Triaged
Bug description:
loud pc-speaker like beep when rebooting under systemd.... literary no
idea where it's coming from. I hope it will just go away by itself
once we port more jobs over to systemd.
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