following recent automatic update on 20.04.2lts I now have no sound on my system

[Peter Jordan]

System sound no longer working. Checked my hardware by loading TAILS on a USB stick. Sound works perfectly. So nothing wrong with my hardware. System 20.04.2LTS was working perfectly until latest automatic update. Noticed that in settings the sound screen has changed in layout. Tried various settings options but unable to recover sound.
settings= output device = Line Out Built-in Audio
configuration = Analogue Surround 5.1 Output
Used to have 7.1 but this now gone.
system pretty unusable without any sound.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: gnome-control-center 1:3.36.5-0ubuntu1
ProcVersionSignature: Ubuntu 5.8.0-44.50~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-44-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.16
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Sun Mar 7 16:46:34 2021
ExecutablePath: /usr/bin/gnome-control-center
InstallationDate: Installed on 2020-11-16 (110 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
SourcePackage: gnome-control-center
UpgradeStatus: No upgrade log present (probably fresh install)

[Daniel van Vugt (vanvugt)]

Thanks for the bug report.

Please try booting an older v5.4 kernel if you still have it. You can get to the boot menu by tapping Esc just before Ubuntu starts.

If booting an old 5.4 kernel does not fix the problem then please also try some older and newer kernels from https://kernel.ubuntu.com/~kernel-ppa/mainline/?C=M;O=D

[Launchpad Janitor (janitor)]

[Expired for linux-signed-hwe-5.8 (Ubuntu) because there has been no activity for 60 days.]