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[KaMbA Dev <kamba.dev@xxxxxxxxx>]

One more thing: if you are using more than one bluetooth device and the
audio stops when using it, I use this set of commands (found this fix
for Ubuntu 10.04, it still works).

1.) sudo hciconfig hci0 lm master

2.) sudo hciconfig hci0 lp hold,sniff,park

It could reset your audio connection, so you need to manually set it
back.

You can add it to your /etc/rc.local so it will run on startup.

Best regards and good luck

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Packages, which is subscribed to pulseaudio in Ubuntu.
https://bugs.launchpad.net/bugs/1181106

Title:
  Failed to change profile to A2DP in 13.04 (Raring), 13.10 (saucy), and
  14.04 (trusty)

Status in Bluez Utilities:
  New
Status in pulseaudio package in Ubuntu:
  Confirmed
Status in pulseaudio package in Debian:
  Fix Released

Bug description:
  I upgraded to 13.04 recently and my A2DP profile, which had been
  working great under 12.10 is suddenly gone.  Neither my blueman applet
  nor the built-in bluetooth manager applet can connect my external
  bluetooth speaker to the A2DP profile.  They can connect to the
  bluetooth device itself just fine.

  Steps I'm using:

  * using blueman, I can connect to the external bluetooth speaker and view the device in the devices listing
  * I can connect the device to the Audio sink and I get a message saying it is now connected and will "show in the PulseAudio mixer"
  * After connecting the external speaker to the audio sink, I can also see the device in the "Play sound through" listing in the Sound system control panel, but the icon has a circle with a line through it.
  * but if I right-click the device and choose "Audio Profile" from the context menu and try to select "High Fidelity Playback (A2DP)" as the new profile, I get an error message stating "failed to change profile to a2dp"

  I've already added "Enable=Socket" in /etc/bluetooth/audio.conf,
  without that I can't pair my headset. Now I can pair it, but I can't
  activate the A2DP profile.

  When I try to activate it, I see this message in my syslog :
  pulseaudio[2603]: [pulseaudio] module-bluetooth-device.c: Profile has no transport

  I tried the kernel 3.9.0 because of a sound problem with my soundcard,
  this kernel fixed my soundcard problem, but A2DP still doesn't work

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