[Bug 1297421] [NEW] Sound stops working occasionally on Latitude E7440

[Diaa Sami]

Public bug reported:

Sound stops(and starts) working from time to time with no definitive
cause, it usually doesn't happen while something is playing so this
makes it harder to find the cause.

It happened once after resume from suspend(STR), restarting fixed it.
Another time it happened after unplugging the AC adapter and turning on the hardware WiFi button, suspending to RAM and resuming fixed it.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.219
ProcVersionSignature: Ubuntu 3.13.0-19.40-generic 3.13.6
Uname: Linux 3.13.0-19-generic x86_64
ApportVersion: 2.13.3-0ubuntu1
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: KDE
Date: Tue Mar 25 19:23:29 2014
InstallationDate: Installed on 2014-03-18 (6 days ago)
InstallationMedia: Kubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140227)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
Symptom: dist-upgrade
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dist-upgrade trusty

** Attachment added: "alsa-info output while sound is not working after unplugging from AC."
   https://bugs.launchpad.net/bugs/1297421/+attachment/4043217/+files/alsa-info-suddenly-stopped-working-after-unplugging.sh

** Description changed:

  Sound stops(and starts) working from time to time with no definitive
  cause, it usually doesn't happen while something is playing so this
  makes it harder to find the cause.
  
- It happened once after resume from suspend, restarting fixed it.
- Another time it happened after unplugging the AC adapter and turning on the hardware WiFi button.
+ It happened once after resume from suspend(STR), restarting fixed it.
+ Another time it happened after unplugging the AC adapter and turning on the hardware WiFi button, suspending to RAM and resuming fixed it.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.219
  ProcVersionSignature: Ubuntu 3.13.0-19.40-generic 3.13.6
  Uname: Linux 3.13.0-19-generic x86_64
  ApportVersion: 2.13.3-0ubuntu1
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: KDE
  Date: Tue Mar 25 19:23:29 2014
  InstallationDate: Installed on 2014-03-18 (6 days ago)
  InstallationMedia: Kubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140227)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  Symptom: dist-upgrade
  UpgradeStatus: No upgrade log present (probably fresh install)

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https://bugs.launchpad.net/bugs/1297421

Title:
  Sound stops working occasionally on Latitude E7440

Status in “ubuntu-release-upgrader” package in Ubuntu:
  New

Bug description:
  Sound stops(and starts) working from time to time with no definitive
  cause, it usually doesn't happen while something is playing so this
  makes it harder to find the cause.

  It happened once after resume from suspend(STR), restarting fixed it.
  Another time it happened after unplugging the AC adapter and turning on the hardware WiFi button, suspending to RAM and resuming fixed it.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.219
  ProcVersionSignature: Ubuntu 3.13.0-19.40-generic 3.13.6
  Uname: Linux 3.13.0-19-generic x86_64
  ApportVersion: 2.13.3-0ubuntu1
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: KDE
  Date: Tue Mar 25 19:23:29 2014
  InstallationDate: Installed on 2014-03-18 (6 days ago)
  InstallationMedia: Kubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140227)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  Symptom: dist-upgrade
  UpgradeStatus: No upgrade log present (probably fresh install)

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