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[David Chatterton <dmchatterton@xxxxxxxxxx>]

Even when the system concedes to detect the Built-in Speakers, a Mode
window appears offering a choice of Stereo or Dolby 5.1 that belongs to
the HDMI output via the Display Port. It is necessary to plug in a set
of headphones in order to select between the Speakers or the Headphones
and update the display to just the Test Sound button by itself as
appropriate for these devices.

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https://bugs.launchpad.net/bugs/1412255

Title:
  Sound settings panel fails to recognise connected sound systems.

Status in unity-control-center package in Ubuntu:
  New

Bug description:
  This is related to a previously reported bug but, since downloading
  updates, the bug has taken on a new set of behaviours.

  Initially, Ubuntu needs to be restarted several times before the
  built-in audio is recognised.

  To eliminate the possibility of a hardware fault, the systems
  diagnostics has been run on boot and indicates no faults even with the
  sound system.

  When the built-in audio fails to be detected, it is possible to get a
  bluetooth headset to appear as a menu item. However, its available
  options do not always appear in the Sound panel. It is necessary to
  select the Pulse Audio Volume Control app and select the bluetooth
  option (Telephony Duplex or High Fidelity Playback) in the
  Configuration tab. These options should appear in the Sound window but
  do not always appear.

  Another instance of the bug showed itself by there being no sound
  through the bluetooth headset even though the Sound window and the
  Vloume Control window indicated that it appeared to be connected.
  (This was sound produced by the Videos app that produced a moving
  ribbon in the Playback tab of the Volume Control window. The
  connection was forced by opening the VLC app and selecting the
  bluetooth headphones from its Audio > Audio Device menu. The audio
  from the Videos app then played as expected.

  Currently, this version of Ubuntu is showing multiple instabilities in
  failing to connect the available sound outputs (Speakers, plug-in
  headphones, Bluetooth headphones) to the sound output of the videos
  app. Even the Test Sound button in the Sound window cannot be relied
  upon to function as expected all of the time.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: unity-control-center 14.10.0+14.10.20140922-0ubuntu2
  ProcVersionSignature: Ubuntu 3.16.0-30.40-generic 3.16.7-ckt3
  Uname: Linux 3.16.0-30-generic x86_64
  ApportVersion: 2.14.7-0ubuntu8.1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sun Jan 18 21:33:29 2015
  ExecutablePath: /usr/bin/unity-control-center
  InstallationDate: Installed on 2014-12-11 (38 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  ProcEnviron:
   PATH=(custom, no user)
   LANGUAGE=en_GB:en
   XDG_RUNTIME_DIR=<set>
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: unity-control-center
  UpgradeStatus: Upgraded to utopic on 2014-12-11 (38 days ago)
  usr_lib_unity-control-center: deja-dup 32.0-0ubuntu1

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