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[Bug 1315196] [NEW] Audio doesn't work

 

Public bug reported:

My 14.04 LTS laptop no longer plays audio, where earlier releases played
audio fine.

A strace on alsamixer shows several failures:
open("/dev/snd/controlC0", O_RDONLY|O_CLOEXEC) = -1 EACCES (Permission denied)
open("/dev/aloadC0", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)

It appears the permissions on /dev/snd/controlC0 weren't properly updated after I logged in:
$ getfacl /dev/snd/controlC0
getfacl: Removing leading '/' from absolute path names
# file: dev/snd/controlC0
# owner: root
# group: audio
user::rw-
user:lightdm:rw-
group::rw-
mask::rw-
other::---

Thanks

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-24-generic 3.13.0-24.46
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  sarnold    2895 F.... pulseaudio
CurrentDesktop: Unity
Date: Thu May  1 16:20:58 2014
HibernationDevice: RESUME=UUID=81b2976f-2830-4449-9dae-e1d44a43fa78
InstallationDate: Installed on 2012-10-18 (560 days ago)
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1)
MachineType: LENOVO 2359CTO
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=7b8c2e1b-d2e6-47d9-9030-c078e9701a1d ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-24-generic N/A
 linux-backports-modules-3.13.0-24-generic  N/A
 linux-firmware                             1.127
SourcePackage: linux
UpgradeStatus: Upgraded to trusty on 2014-04-12 (19 days ago)
dmi.bios.date: 09/13/2012
dmi.bios.vendor: LENOVO
dmi.bios.version: G4ET62WW (2.04 )
dmi.board.asset.tag: Not Available
dmi.board.name: 2359CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrG4ET62WW(2.04):bd09/13/2012:svnLENOVO:pn2359CTO:pvrThinkPadT530:rvnLENOVO:rn2359CTO:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2359CTO
dmi.product.version: ThinkPad T530
dmi.sys.vendor: LENOVO

** Affects: systemd (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug trusty

** Attachment added: "strace alsamixer"
   https://bugs.launchpad.net/bugs/1315196/+attachment/4102784/+files/alsamixer

** Package changed: linux (Ubuntu) => systemd (Ubuntu)

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https://bugs.launchpad.net/bugs/1315196

Title:
  Audio doesn't work

Status in “systemd” package in Ubuntu:
  New

Bug description:
  My 14.04 LTS laptop no longer plays audio, where earlier releases
  played audio fine.

  A strace on alsamixer shows several failures:
  open("/dev/snd/controlC0", O_RDONLY|O_CLOEXEC) = -1 EACCES (Permission denied)
  open("/dev/aloadC0", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)

  It appears the permissions on /dev/snd/controlC0 weren't properly updated after I logged in:
  $ getfacl /dev/snd/controlC0
  getfacl: Removing leading '/' from absolute path names
  # file: dev/snd/controlC0
  # owner: root
  # group: audio
  user::rw-
  user:lightdm:rw-
  group::rw-
  mask::rw-
  other::---

  Thanks

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-24-generic 3.13.0-24.46
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  sarnold    2895 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Thu May  1 16:20:58 2014
  HibernationDevice: RESUME=UUID=81b2976f-2830-4449-9dae-e1d44a43fa78
  InstallationDate: Installed on 2012-10-18 (560 days ago)
  InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1)
  MachineType: LENOVO 2359CTO
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=7b8c2e1b-d2e6-47d9-9030-c078e9701a1d ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-24-generic N/A
   linux-backports-modules-3.13.0-24-generic  N/A
   linux-firmware                             1.127
  SourcePackage: linux
  UpgradeStatus: Upgraded to trusty on 2014-04-12 (19 days ago)
  dmi.bios.date: 09/13/2012
  dmi.bios.vendor: LENOVO
  dmi.bios.version: G4ET62WW (2.04 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 2359CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrG4ET62WW(2.04):bd09/13/2012:svnLENOVO:pn2359CTO:pvrThinkPadT530:rvnLENOVO:rn2359CTO:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2359CTO
  dmi.product.version: ThinkPad T530
  dmi.sys.vendor: LENOVO

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