[vc4-hdmi - vc4-hdmi-0, playback] Playback problem

System sound output setting always defaults to headphones instead of hdmi at startup and login and must be reset every time. No headphones are connected; only hdmi from pi 4 to TV and from TV to sound system via hdmi-arc.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: alsa-base 1.0.25+dfsg-0ubuntu7
ProcVersionSignature: Ubuntu 5.15.0-1017.19-raspi 5.15.60
Uname: Linux 5.15.0-1017-raspi aarch64
ApportVersion: 2.20.11-0ubuntu82.1
Architecture: arm64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: bruzr 10351 F.... pulseaudio
 /dev/snd/controlC0: bruzr 10351 F.... pulseaudio
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Wed Nov 2 04:54:41 2022
ImageMediaBuild: 20220809
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:vc4hdmi0 failed
Symptom_AlsaPlaybackTestStderr: S a m p l e f o r m a t n o t a v a i l a b l e f o r p l a y b a c k : I n v a l i d a r g u m e n t
Symptom_Card: vc4-hdmi - vc4-hdmi-1
Symptom_Type: None of the above
Title: [vc4-hdmi - vc4-hdmi-0, playback] Playback problem
UpgradeStatus: No upgrade log present (probably fresh install)