[pulseaudio] alsa-ucm.c: Assertion 'jack' failed at modules/alsa/alsa-ucm.c:2158, function device_add_hw_mute_jack(). Aborting.

[John Gilmore]

I have a Gigabyte motherboard that gives pulseaudio fits in Ubuntu 20.04 beta. (It worked fine in 18.04.4 LTS.) It produced pulseaudio crashes with bug #1870833 until a proposed fix was brought in from upstream:

  https://bugs.launchpad.net/ubuntu/+source/pulseaudio/1:13.99.1-1ubuntu2

However, that did not actually make pulseaudio work; now it throws this error and aborts:

  Apr 18 01:13:10 shh pulseaudio[1443]: E: [pulseaudio] alsa-ucm.c: Assertion 'jack' failed at modules/alsa/alsa-ucm.c:2158, function device_add_hw_mute_jack(). Aborting.

It was suggested in the previous bug that I should open a new bug for this. Here you are!

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: pulseaudio 1:13.99.1-1ubuntu2
ProcVersionSignature: Ubuntu 5.4.0-24.28-generic 5.4.30
Uname: Linux 5.4.0-24-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D7p', '/dev/snd/pcmC0D3p', '/dev/snd/by-path', '/dev/snd/controlC1', '/dev/snd/hwC1D1', '/dev/snd/hwC1D0', '/dev/snd/pcmC1D4c', '/dev/snd/pcmC1D4p', '/dev/snd/pcmC1D2c', '/dev/snd/pcmC1D1p', '/dev/snd/pcmC1D0c', '/dev/snd/pcmC1D0p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Sun Apr 19 00:25:26 2020
InstallationDate: Installed on 2020-04-17 (1 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200402)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
SourcePackage: pulseaudio
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/16/2019
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: F25
dmi.board.asset.tag: Default string
dmi.board.name: AX370-Gaming 5
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: Default string
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF25:bd01/16/2019:svnGigabyteTechnologyCo.,Ltd.:pnAX370-Gaming5:pvrDefaultstring:rvnGigabyteTechnologyCo.,Ltd.:rnAX370-Gaming5:rvrDefaultstring:cvnDefaultstring:ct3:cvrDefaultstring:
dmi.product.family: Default string
dmi.product.name: AX370-Gaming 5
dmi.product.sku: Default string
dmi.product.version: Default string
dmi.sys.vendor: Gigabyte Technology Co., Ltd.

[John Gilmore (gnu-gilmore)]

I ran the software updater and noticed that it installed a new pulseaudio:

pulseaudio:
  Installed: 1:13.99.1-1ubuntu3
  Candidate: 1:13.99.1-1ubuntu3

After rebooting the system, I'm running this version.

You will be happy to learn that pulseaudio doesn't crash with this version, and it shows sound devices in Settings -> Sound, and the speaker test actually plays (once I picked Line Out rather than the default which was Speaker -- my chassis doesn't have a speaker).

I am even able to play mp3 and flac music in Totem. I think it's fixed! Thank you!