Can also confirm the issue with Sony WH-H900N headphones, Arch with
kernel 4.17.4, BlueZ 5.50, PulseAudio 12.0.

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  [regression] Bluetooth audio no longer supports A2DP (stuck in HSP/HFP

Status in PulseAudio:
Status in bluez package in Ubuntu:
Status in pulseaudio package in Ubuntu:
  Fix Released
Status in bluez source package in Vivid:
  Won't Fix
Status in pulseaudio source package in Vivid:
  Won't Fix
Status in pulseaudio source package in Xenial:
  Fix Released

Bug description:
  Bluetooth audio seemingly refuses to support A2DP (stuck in HSP/HFP mode). 
A2DP is the high quality profile used for Bluetooth speakers and music in 

  [Test Case]
  1. Pair a Bluetooth audio device with Ubuntu.
  2. Go to Sound settings and check the device's current "Mode".
  3. If the current Mode is not yet A2DP then try to set it to A2DP
  Expected: The mode is either A2DP by default or can be set to it.

  [Regression Potential]
  Low. The SRU focuses on Bluetooth logic in pulseaudio, so that is the main 
area affected. A combination of related A2DP bugs in pulseaudio in xenial means 
it is difficult to get working at all without this patch. So highly unlikely 
Bluetooth audio support could get worse. Since pulseaudio itself is being 
modified there is always a regression potential in support for other audio 
devices, but several audio devices have been tested and all continue to work 
well with the patch.

  [Other notes]
  Related to bug 1283003 and bug 1582213. Possibly others too. The debdiff 
which fixes this is attached to bug 1582213.

  Please note that Bluetooth and Bluetooth audio support in xenial is
  still not perfect. This SRU only aims to address a few of the most
  troublesome issues. Please consider the fact that this is an
  incremental improvement and some people are still likely to experience
  some bugs related to pulseaudio and Bluetooth, even after this SRU.

  The patch was authored by Luke Yelavich with help from Konrad
  ZapaƂowicz. And it has received further testing over the past two
  months by Konrad, Jim Hodapp and Daniel van Vugt. The debdiff proposed
  here only changes the changelog wording from Luke's original PPA.

  [Original Description]
  Just installed 15.04 fresh from the latest ISO (beta2).

  I'm bummed to see my bluetooth headset (Bose Soundlink overear) seems
  to have regressed in functionality.

  In 14.10, I was able to set the output profile either to a2dp or
  hsp/hfp (telephony duplex).

  In 15.04, it only works in telephony duplex mode.  I can't get high
  fidelity sound playback to work at all.

  This thread seems to be related, though the workaround within did not solve 
the problem for me:

  The bug is still present in 16.04 LTS and 16.10.

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