No sound - Checking pulseaudio indicates system switches audio card to HDMI (Ubuntu 20.04)

[Mei]

Sound settings indicates sound is being recognised in the Output Device bar under Analogue Output - Built-in Audio but no sound is projected externally through speakers or headphones. Speakers and headphones work.

Switched to HDA Intel PCH from HDA Intel HDMI on Alsamixer and unmuted everything. When exiting alsamixer and reopening alsamixer, it reverts back to HDA Intel HDMI.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: pulseaudio 1:13.99.1-1ubuntu3.11
ProcVersionSignature: Ubuntu 5.4.0-84.94-generic 5.4.133
Uname: Linux 5.4.0-84-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.11-0ubuntu27.18
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: meizing 1482 F.... pulseaudio
 /dev/snd/pcmC0D3p: meizing 1482 F...m pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Sat Sep 11 20:21:28 2021
InstallationDate: Installed on 2019-05-27 (837 days ago)
InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
SourcePackage: pulseaudio
UpgradeStatus: Upgraded to focal on 2021-09-11 (0 days ago)
dmi.bios.date: 12/24/2018
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A19
dmi.board.name: 0TM99H
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA19:bd12/24/2018:svnDellInc.:pnXPS139343:pvr:rvnDellInc.:rn0TM99H:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.name: XPS 13 9343
dmi.product.sku: 0665
dmi.sys.vendor: Dell Inc.

[Hui Wang (hui.wang)]

please run $lsmod | grep hdmi

and upload the output of that command.

The "snd_hda_codec_hdmi" should drive the hdmi audio instead of "snd_hda_codec_generic".

[Launchpad Janitor (janitor)]

[Expired for pulseaudio (Ubuntu) because there has been no activity for 60 days.]