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 ** Tags added: regression-release ** Package changed: gnome-control-center (Ubuntu) => linux-signed- hwe-5.8 (Ubuntu) ** Changed in: linux-signed-hwe-5.8 (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1918066 Title: following recent automatic update on 20.04.2lts I now have no sound on my system Status in linux-signed-hwe-5.8 package in Ubuntu: Incomplete Bug description: 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) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.8/+bug/1918066/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

