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[Launchpad Bug Tracker <1574324@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package pulseaudio - 1:9.0-2ubuntu2.1

---------------
pulseaudio (1:9.0-2ubuntu2.1) yakkety; urgency=medium

  * 0502-bluetooth-bluez5-bring-back-SCO-over-PCM-support.patch:
    - Remove patch hunk that set u->transport to NULL. At the time this
      code was written for 15.10, it was to prevent an assertion. Now with
      newer versions of pulse, the opposite is happening in some circumstances
      (LP: #1574324)

 -- Luke Yelavich <themuso@xxxxxxxxxx>  Thu, 03 Nov 2016 16:57:47 +1100

** Changed in: pulseaudio (Ubuntu Yakkety)
       Status: Fix Committed => Fix Released

** Changed in: pulseaudio (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1574324

Title:
  pulseaudio crashes when connecting to bluetooth headphones (due to
  ubuntu changes?)

Status in pulseaudio package in Ubuntu:
  Fix Released
Status in pulseaudio source package in Xenial:
  Fix Released
Status in pulseaudio source package in Yakkety:
  Fix Released

Bug description:
  Impact:

  A patch we carry for Ubuntu touch introduced a change that originally
  was required to make sure PulseAudio did not crash. This patch was
  ported to PulseAudio 8 in Xenial, but the patch author's bluetooth
  hardware that was to hand at the time worked so was assumed to be ok.
  However, the opposite is now happening, i.e PulseAudio is crashing
  with a subset of Bluetooth hardware.

  Regression potential:

  Very low to none. As can be read in this report, much debugging and
  testing has been done to find the problem, and the eventual fix.
  Moreover the change is the removal of a patch hunk that removed a line
  of code originally present in PulseAudio.

  Test case:

  NOTE that this test case applies to bluetooth hardware that is
  identified as not working in this bug report.

  1. Install, or upgrade to Xenial or yakkety.
  2. Pair your bluetooth device in the bluetooth settings in the relevant settings application for your desktop environment.
  3. Once paired, you will notice that sound stops working, as pulseaudio has thrown an assertion error.
  4. You do not have to remove your audio device from the paired device list, but it may be easier to do so for the next part of the testing.
  5. Update to the version of PulseAudio in xenial-proposed which is 1:8.0-0ubuntu3.1, or in yakkety-proposed, which is 1:9.0-2ubuntu2.1.
  6. Re-pair your device. Audio should continue to work, and you should be able to switch to your bluetooth device and use it.

  
  Original bug report:

  When I attempt to connect my Jaybird Bluebuds X to Ubuntu 16.04
  pulseaudio crashes, this does *NOT* happen with a Jambox which leads
  me to believe it's an intermittent problem with some hardware. This
  did not happen on Ubuntu 15.10 (which was an upgrade of 15.04).

  Ubuntu Release:

  Description:	Ubuntu 16.04 LTS
  Release:	16.04

  Pulseaudio Version:

  pulseaudio:
    Installed: 1:8.0-0ubuntu3
    Candidate: 1:8.0-0ubuntu3
    Version table:
   *** 1:8.0-0ubuntu3 500
          500 http://gb.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
          100 /var/lib/dpkg/status

  Device info:

  [bluetooth]# info 44:5E:F3:B4:07:29
  Device 44:5E:F3:B4:07:29
   Name: BlueBuds X
   Alias: BlueBuds X
   Class: 0x240404
   Icon: audio-card
   Paired: yes
   Trusted: yes
   Blocked: no
   Connected: no
   LegacyPairing: no
   UUID: Headset                   (00001108-0000-1000-8000-00805f9b34fb)
   UUID: Audio Sink                (0000110b-0000-1000-8000-00805f9b34fb)
   UUID: A/V Remote Control Target (0000110c-0000-1000-8000-00805f9b34fb)
   UUID: A/V Remote Control        (0000110e-0000-1000-8000-00805f9b34fb)
   UUID: Handsfree                 (0000111e-0000-1000-8000-00805f9b34fb)
   UUID: Unknown                   (000080ff-0000-1000-8000-00805f9b34fb)

  I have also attached a debug dump of Pulseaudio when attempting to
  connect to the headphones.

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