My laptop with Ubuntu 20.10 automatically switches to the HDMI output
when I plug in my monitor (via a USB C cable connected to a dock station
connected to the monitor via a HDMI cable).
And then, a second later, it switches to the USB dock's audio output
(which has nothing plugged in), but that's a different bug.
Incidentally, module-switch-on-connect in PulseAudio 14 (and also Ubuntu
20.10's 13.99.2) has a blacklist of sink names that should not be switched to.
The default value of this blacklist is a regexp matching "hdmi". The blacklist
doesn't appear to work (which is also a different bug).
If it does start to work at some point, you may have to edit
/etc/pulse/default.pa and change
load-module module-switch-on-connect
to say
load-module module-switch-on-connect blacklist=""
if you want HDMI outputs to be switched to.
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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to pulseaudio in Ubuntu.
https://bugs.launchpad.net/bugs/1707611
Title:
Sound does not automatically switch to HDMI when connected
Status in pulseaudio package in Ubuntu:
Confirmed
Bug description:
When connecting a HDMI cable or other audio device, the user must
manually click on the "sound volume" in the top-right and switch to
the newly connected device.
Example: you connect a HDMI cable to the television, but then you must
manually choose the HDMI sound option; it does not get selected
automatically.
Often times e.g. when the HDMI cable is disconnected, the user must
then manually click on the "speakers" or "line out" setting - EVEN IF
IT'S ALREADY SELECTED, it must be clicked on again for the sound to
work through the computer's speakers.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1707611/+subscriptions
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