[Lenovo IdeaPad 5 15IIL05] Audio does not work in kernel 5.4.0-52, but does in 5.4.0-48

[Corbin]

While pusleaudio works properly on gdm before logging in, once I login, it fails. I was able to successfully restart pulseaudio with pulseaudio -k on my first attempt, and one other time, but I have been unable to reproduce this. It (pulseaudio -k )usually does nothing. As such, adding "pulseaudio -k" to run on on login as a workaround does not work. This started happening after updating from kernel 5.4.0-48 to 5.4.0-52. Rolling back to 48 makes the issue go away.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: pulseaudio 1:13.99.1-1ubuntu3.7
ProcVersionSignature: Ubuntu 5.4.0-51.56-generic 5.4.65
Uname: Linux 5.4.0-51-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.8
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Sun Oct 18 14:11:31 2020
InstallationDate: Installed on 2020-07-03 (107 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: pulseaudio
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/18/2020
dmi.bios.vendor: LENOVO
dmi.bios.version: DPCN40WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40709 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: IdeaPad 5 15IIL05
dmi.modalias: dmi:bvnLENOVO:bvrDPCN40WW:bd03/18/2020:svnLENOVO:pn81YK:pvrIdeaPad515IIL05:rvnLENOVO:rnLNVNB161216:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrIdeaPad515IIL05:
dmi.product.family: IdeaPad 5 15IIL05
dmi.product.name: 81YK
dmi.product.sku: LENOVO_MT_81YK_BU_idea_FM_IdeaPad 5 15IIL05
dmi.product.version: IdeaPad 5 15IIL05
dmi.sys.vendor: LENOVO

[Daniel van Vugt (vanvugt)]

Does "fails" mean the pulseaudio process is running without producing sound or not running at all?

[Daniel van Vugt (vanvugt)]

Ah nevermind. If you have narrowed it down to a kernel version then it's not pulseaudio at all. Reassigning...

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1900349

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Daniel van Vugt (vanvugt)]

Also, does kernel 5.4.0-51.56 have the bug?

[Corbin (cpwest11)]

I am not certain the kernel is the cause, I just noticed the bug manifested when I updated. I will upload apport logs. I don't actually believe it is a kernel bug, because PA works properly on the login screen and only fails after login.

[Corbin (cpwest11)]

After updating again, the bug is gone. I will be closing the bug report