Non-existent audio output selected on Pi 400

[Dave Jones]

When testing the Ubuntu 22.10 (kinetic) Desktop for Raspberry Pi on a Raspberry Pi 400 (the keyboard-based model), the new pipewire stack selects a non-existent audio output by default. Specifically, the output device listed in the gnome control center is "Analogue Output - Built-in Audio".

On the Raspberry Pi 4 this refers to the auxiliary output (the 3.5mm headphone jack on the board), however the Pi 400 has no such output. Under the older pulseaudio stack, this was correct (no analogue output was listed) and the HDMI output was correctly selected on the Pi 400 (though, notably, the older stack got the default output wrong on the Pi 4; see LP: #1877194).

This is a low priority since the default selection is easily changed from the gnome control center, and the new selection persists across boots (in contrast to the aforementioned pulseaudio bug).

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
https://iso.qa.ubuntu.com/qatracker/reports/bugs/1993316

[Sebastien Bacher (seb128)]

Thanks Dave, since we currently don't have an audio stack maintainer could you perhaps also report it upstream on https://gitlab.freedesktop.org/pipewire/pipewire ? it would increase the chances to have to reviewed

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Dave Jones (waveform)]

No longer occurs on the Mantic final images; HDMI is selected by default. Marking fix released.