Audio Problem, soundcard not detected

[Víctor]

Hi,

After last patch in Ubuntu 20.04.2 LTS, I have lost my audio.

I have got an Asus monitor with speakers inside the monitor. The sound come to the monitor from the HDMI cable.

My GPU is an GTX 1080 Ti.

I have got a KVM Switch in which is connected my monitor, Keyboard and Mouse.

Before the last update of Ubuntu, all worked well.

When I go to settings in Ubuntu, I couldn't watch any audio device check the image attached.

Regards.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 5.11.0-22.23~20.04.1-generic 5.11.21
Uname: Linux 5.11.0-22-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.18
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Wed Jun 23 17:30:22 2021
InstallationDate: Installed on 2021-01-14 (159 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
PackageArchitecture: all
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=es_ES.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Title: PCI/internal sound card not detected
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/04/2020
dmi.bios.release: 5.17
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 3001
dmi.board.asset.tag: Default string
dmi.board.name: PRIME X570-PRO
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr3001:bd12/04/2020:br5.17:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnPRIMEX570-PRO:rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: System Product Name
dmi.product.sku: SKU
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer

[Víctor (pitx89)]

Added aditional info.

[Víctor (pitx89)]

Added aditional info.

[Hui Wang (hui.wang)]

You forgot to install linux-modules-extra package, the audio driver is in that package.

[Víctor (pitx89)]

Why do I need to install nothing when an Ubuntu Update is installed?

It has no sense. The Ubuntu Update must have all the things that the update need.

I have installed this:

sudo apt install linux-generic
and this:
sudo apt install linux-generic-hwe-20.04

but it doesn't work.

[Hui Wang (hui.wang)]

you installed 20.04 on your machine, but the kernel version in your log is 5.11.0-generic, how did you install the 5.11 kernel under 20.04, I remember it is 5.8 kernel under 20.04 if you run update.

[Víctor (pitx89)]

I only run the updates of Ubuntu. I have not installed the last kernel by myself.

Maybe in the past I have changed something that generate that this situation happen, but I don't remember something similar.

Are you sure that Ubuntu is not installing the 5.11 kernel by themself?

[Víctor (pitx89)]

I came back to the kernel 5.8.0-59-generic configuring this in the Grub and I have got the sound again.

But the problem still exists in the 5.11 kernel.

[Hui Wang (hui.wang)]

Please upload the output of 'dpkg -l | grep linux-modules-extra*', let us see if you install that package for kernel 5.11.

thx.