Comment 0 for bug 1915117

Ubuntu version: 20.10 (updated from 20.04)
Kernel: 5.8.0-41-generic #46-Ubuntu
Manufacturer: Acer
Product Name: Swift SF314-54
BIOS Revision: 1.11

Audio card: Realtek High Definition Audio
Multimedia audio controller [0401]: Intel Corporation Sunrise Point-LP HD Audio [8086:9d71] (rev 21)

Summary
=======

After upgrading from linux kernel 5.4 to 5.8, there is no more sound card available. However, if I select kernel 5.4 in GRUB, the sound card is available.

Steps to reproduce
==================

1. Install 20.04 or 20.10 with a kenel 5.4
2. Check that sound output works as excepted (Settings > Sound > Output > Test)
3. Check that `alsa-info` command returns information
4. Upgrade kernel to 5.8

Expected results
================

Sound output still works.

Actual results
==============

No more sound card detected (Sound Settings display "Dummy Output" in the list of output devices).

ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: linux-image-5.8.0-41-generic 5.8.0-41.46
ProcVersionSignature: Ubuntu 5.8.0-41.46-generic 5.8.18
Uname: Linux 5.8.0-41-generic x86_64
ApportVersion: 2.20.11-0ubuntu50.5
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Tue Feb 9 14:42:00 2021
InstallationDate: Installed on 2019-01-20 (751 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
MachineType: Acer Swift SF314-54
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.8.0-41-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash mem_sleep_default=deep vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-5.8.0-41-generic N/A
 linux-backports-modules-5.8.0-41-generic N/A
 linux-firmware 1.190.3
SourcePackage: linux
UpgradeStatus: Upgraded to groovy on 2021-02-03 (5 days ago)
dmi.bios.date: 11/21/2018
dmi.bios.release: 1.11
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: V1.11
dmi.board.name: Strongbow_KL
dmi.board.vendor: KBL
dmi.board.version: V1.11
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V1.11
dmi.ec.firmware.release: 1.6
dmi.modalias: dmi:bvnInsydeCorp.:bvrV1.11:bd11/21/2018:br1.11:efr1.6:svnAcer:pnSwiftSF314-54:pvrV1.11:rvnKBL:rnStrongbow_KL:rvrV1.11:cvnAcer:ct10:cvrV1.11:
dmi.product.family: Swift 3
dmi.product.name: Swift SF314-54
dmi.product.sku: 0000000000000000
dmi.product.version: V1.11
dmi.sys.vendor: Acer