Public bug reported:

after working fine, at some stage ubuntu stopped playing sounds - seems that 
sound card is not detected by os
tried https://wiki.ubuntu.com/Audio/UpgradingAlsa/DKMS with both xenial 
packages, didn't work either (packages were not displayed in software center 
after reboot although they were completely installed)

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 4.4.0-131.157-generic 4.4.134
Uname: Linux 4.4.0-131-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', 
'/dev/snd/timer'] failed with exit code 1:
CurrentDesktop: Unity
Date: Wed Aug  1 23:08:49 2018
InstallationDate: Installed on 2017-08-21 (345 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Title: PCI/internal sound card not detected
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/16/2017
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: V1.23
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: Ironman_SK
dmi.board.vendor: Acer
dmi.board.version: V1.23
dmi.chassis.type: 10
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.version: Chassis Version
dmi.modalias: 
dmi:bvnInsydeCorp.:bvrV1.23:bd01/16/2017:svnAcer:pnAspireE5-575G:pvrV1.23:rvnAcer:rnIronman_SK:rvrV1.23:cvnChassisManufacturer:ct10:cvrChassisVersion:
dmi.product.name: Aspire E5-575G
dmi.product.version: V1.23
dmi.sys.vendor: Acer

** Affects: alsa-driver (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/1784941

Title:
  PCI/internal sound card not detected

Status in alsa-driver package in Ubuntu:
  New

Bug description:
  after working fine, at some stage ubuntu stopped playing sounds - seems that 
sound card is not detected by os
  tried https://wiki.ubuntu.com/Audio/UpgradingAlsa/DKMS with both xenial 
packages, didn't work either (packages were not displayed in software center 
after reboot although they were completely installed)

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu5
  ProcVersionSignature: Ubuntu 4.4.0-131.157-generic 4.4.134
  Uname: Linux 4.4.0-131-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', 
'/dev/snd/timer'] failed with exit code 1:
  CurrentDesktop: Unity
  Date: Wed Aug  1 23:08:49 2018
  InstallationDate: Installed on 2017-08-21 (345 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 
(20160719)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Title: PCI/internal sound card not detected
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/16/2017
  dmi.bios.vendor: Insyde Corp.
  dmi.bios.version: V1.23
  dmi.board.asset.tag: Type2 - Board Asset Tag
  dmi.board.name: Ironman_SK
  dmi.board.vendor: Acer
  dmi.board.version: V1.23
  dmi.chassis.type: 10
  dmi.chassis.vendor: Chassis Manufacturer
  dmi.chassis.version: Chassis Version
  dmi.modalias: 
dmi:bvnInsydeCorp.:bvrV1.23:bd01/16/2017:svnAcer:pnAspireE5-575G:pvrV1.23:rvnAcer:rnIronman_SK:rvrV1.23:cvnChassisManufacturer:ct10:cvrChassisVersion:
  dmi.product.name: Aspire E5-575G
  dmi.product.version: V1.23
  dmi.sys.vendor: Acer

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