For those with Sony headphones, and who are affected by this annoying
bug, the attached "headphones" Perl script is a partial workaround.
You'll need to edit it for the bluetooth address of your headphones. Run
it after switching your headphones on and they connect, and it sets

** Attachment added: "headphones"

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  Bluetooth headphones only use A2DP when connected manually

Status in alsa-driver package in Ubuntu:
  Won't Fix

Bug description:
  Issue with Sony MDR-1ABT Bluetooth headphones:
  Once paired, the headphones will be connected automatically whenever they are 
switched on. However when connected this way, only the HSP/HFP profile will 
work and trying to change to A2DP in sound settings does nothing.
  If the headphones are then manually disconnected and reconnected from 
Bluetooth settings, they will initially use HSP/HFP but then selecting A2DP in 
sound settings will successfully make them use A2DP.

  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: alsa-base 1.0.25+dfsg-0ubuntu5
  ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
  Uname: Linux 4.13.0-16-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
  ApportVersion: 2.20.7-0ubuntu3
  Architecture: amd64
   /dev/snd/controlC1:  neil       1443 F.... pulseaudio
   /dev/snd/pcmC0D0c:   neil       1443 F...m pulseaudio
   /dev/snd/controlC0:  neil       1443 F.... pulseaudio
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Oct 19 19:12:59 2017
  InstallationDate: Installed on 2017-10-19 (0 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_Card: MDR-1ABT
  Symptom_Type: None of the above
  Title: [MDR-1ABT, playback] Playback problem
  UpgradeStatus: No upgrade log present (probably fresh install) 07/06/2017
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: F5
  dmi.board.asset.tag: Default string Z270N-WIFI-CF
  dmi.board.vendor: Gigabyte Technology Co., Ltd.
  dmi.board.version: x.x
  dmi.chassis.asset.tag: Default string
  dmi.chassis.type: 3
  dmi.chassis.vendor: Default string
  dmi.chassis.version: Default string
dmi:bvnAmericanMegatrendsInc.:bvrF5:bd07/06/2017:svnGigabyteTechnologyCo.,Ltd.:pnZ270N-WIFI:pvrDefaultstring:rvnGigabyteTechnologyCo.,Ltd.:rnZ270N-WIFI-CF:rvrx.x:cvnDefaultstring:ct3:cvrDefaultstring: Default string Z270N-WIFI
  dmi.product.version: Default string
  dmi.sys.vendor: Gigabyte Technology Co., Ltd.

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