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[Launchpad Bug Tracker <1296425@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package ubuntu-drivers-common - 1:0.2.91.9

---------------
ubuntu-drivers-common (1:0.2.91.9) trusty-proposed; urgency=medium

  * sl-modem plugin: Keep environment for aplay, just ensure it's using the C
    locale. This avoids staring pulseaudio twice and causing races for
    attaching devices to pulseaudio. (LP: #1296425)

ubuntu-drivers-common (1:0.2.91.8) trusty-proposed; urgency=medium

  * gpu-manager.c:
    - Refine checks for blacklisted modules, so that we don't end up
      catching false positives (LP: #1376966).
      Thanks to Pär Lindfors for the patch.
 -- Martin Pitt <martin.pitt@xxxxxxxxxx>   Mon, 05 Jan 2015 17:27:53 +0100

** Changed in: ubuntu-drivers-common (Ubuntu Trusty)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1296425

Title:
  pulseaudio is started twice - effectively making device management
  impossible.

Status in alsa-plugins package in Ubuntu:
  Invalid
Status in ubuntu-drivers-common package in Ubuntu:
  Fix Released
Status in alsa-plugins source package in Trusty:
  Invalid
Status in ubuntu-drivers-common source package in Trusty:
  Fix Released

Bug description:
  [Impact]

  On the current kubuntu 14.04 live-image (and for a 13.10 upgraded
  system) pulseaudio is running twice. This makes attaching/deattaching
  of usb-headset and other stuff impossible because the two instances
  fight over the events.

  The fix is https://github.com/tseliot/ubuntu-drivers-
  common/commit/5fe70ce1

  [Test Case]

  To reproduce just boot up the current image and do a "ps -ef | grep
  pulseaudio"

  [Regression Potential]

  Low. This fix has been out for many months in 14.10, and only changes
  the environment that "aplay -l" gets called with. In the absolutely
  worst case if this goes totally wrong, ubuntu-drivers would stop to
  detect sl-modem capable soft-modems.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: pulseaudio 1:4.0-0ubuntu10
  ProcVersionSignature: Ubuntu 3.13.0-19.39-lowlatency 3.13.6
  Uname: Linux 3.13.0-19-lowlatency i686
  ApportVersion: 2.13.3-0ubuntu1
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  sgh        2336 F.... pulseaudio
                        sgh        2796 F.... pulseaudio
   /dev/snd/controlC0:  sgh        2336 F.... pulseaudio
                        sgh        2796 F.... pulseaudio
  CurrentDesktop: KDE
  Date: Sun Mar 23 22:36:50 2014
  InstallationDate: Installed on 2013-12-24 (89 days ago)
  InstallationMedia: Kubuntu 14.04 LTS "Trusty Tahr" - Alpha i386 (20131224)
  SourcePackage: pulseaudio
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/02/2012
  dmi.bios.vendor: LENOVO
  dmi.bios.version: G7ET31WW (1.13 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 2356GCG
  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:bvrG7ET31WW(1.13):bd07/02/2012:svnLENOVO:pn2356GCG:pvrThinkPadT430s:rvnLENOVO:rn2356GCG:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2356GCG
  dmi.product.version: ThinkPad T430s
  dmi.sys.vendor: LENOVO

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