Public bug reported:
On Ubuntu 21.04:
With pulseaudio lock screen notifications turned on (by default), every
time an audio device is added or removed, the screen gets woken up to
show the notification. When a monitor goes to sleep, it switches off the
HDMI audio channel connected to pulseaudio, which causes a notification,
which causes the screen to switch on again. Then the lock screen goes to
sleep again after a timeout.
Rinse, repeat.
Fixed by switching off lock screen notifications for pulseaudio, but
this was a head scratcher for a good few months.
Suggested fix - don't cause notifications to wake up a monitor.
** Affects: pulseaudio (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1943463
Title:
pulseaudio lock screen notifications break sleep
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