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[Launchpad Bug Tracker <1396464@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package unity-control-center -
15.04.0+15.10.20150805-0ubuntu1

---------------
unity-control-center (15.04.0+15.10.20150805-0ubuntu1) wily; urgency=medium

  [ Robert Ancell ]
  * Update system information logo for Wily Werewolf (LP: #1470840)

  [ Yu Ning ]
  * Trigger the "value-changed" signal outside set_is_muted() when
    necessary. (LP: #1396464)

 -- CI Train Bot <ci-train-bot@xxxxxxxxxxxxx>  Wed, 05 Aug 2015 09:44:44
+0000

** Changed in: unity-control-center (Ubuntu)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1396464

Title:
  Audio switch between mute and unmute automatically and repeatedly

Status in unity-control-center package in Ubuntu:
  Fix Released
Status in unity-settings-daemon package in Ubuntu:
  Invalid

Bug description:
  Steps:
  1. Install Ubuntu 14.04.1 image
  2. launch "System Settings" -> "Sound"
  3. press "Volume Down" until mute
  4. press "Volume Down" for several times then press "Volume Up" immediately
  5. repeat step 4 for several times

  Excepted result:
  everything should just works

  Actual result:
  system auto switch between mute and unmute automatically and repeatedly.

  Once the issue is reproduced we can found cpu is running at 100% by several processes:
  * pulseaudio
  * unity-control-center
  * unity-panel-service

  The issue will last until we close the "Sound" window.

  unity-settings-daemon version is 14.04.0+14.0420140606-0ubuntu1

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