[Bug 1362313] [NEW] a2dp bluetooth music playback broken after bluetooth device reconnect

[AZ]

Public bug reported:

What happens?
1. connct a2dp device
2. start playback
3. reconnect a2dp device from remote
4. ubuntu reports device is connected
5. a2dp device does not show up in pulseaudio nor does music playback work (via a2dp device). sometimes there are "timeout" error messages in kde.
6. try to reconnect from ubuntu, restart bluetooth daemon, restart pulseaudio daemon. it all does not help.
7. what does help is restarting 1. dbus 2. bluetooth and 3. pulseaudio then connect the device (if not already auto-connected)

After step 3, there is the following error message in syslog (no other
errors in syslog or dmesg):

pulseaudio[7812]: [bluetooth] bluetooth-util.c: Failed to release
transport /org/bluez/7791/hci0/dev_C8_84_47_10_24_A2/fd2: Method
"Release" with signature "s" on interface "org.bluez.MediaTransport"
doesn't exist

What I expected to happen?
After the device reconnect, the music playback switches playback back to the bluetooth device.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: bluetooth 4.101-0ubuntu13
ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
Uname: Linux 3.13.0-32-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.3
Architecture: amd64
Date: Wed Aug 27 21:41:34 2014
InterestingModules: rfcomm bnep btusb bluetooth
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=de_DE:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-32-generic root=/dev/mapper/linux64-root64 ro nomdmonddf nomdmonisw nomdmonddf nomdmonisw
SourcePackage: bluez
UpgradeStatus: Upgraded to trusty on 2014-06-18 (70 days ago)
dmi.bios.date: 12/06/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P2.00
dmi.board.name: B85 Pro4
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP2.00:bd12/06/2013:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnB85Pro4:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.
hciconfig:
 hci0:	Type: BR/EDR  Bus: USB
 	BD Address: 00:02:72:CC:E6:D5  ACL MTU: 1021:8  SCO MTU: 64:1
 	UP RUNNING PSCAN ISCAN 
 	RX bytes:100536 acl:18 sco:0 events:14179 errors:0
 	TX bytes:24059553 acl:28186 sco:0 commands:77 errors:0
syslog: Aug 27 20:46:20 charlie bluetoothd[1538]: /org/bluez/1538/hci0/dev_C8_84_47_10_24_A2/fd0: fd(25) ready

** Affects: bluez (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug trusty

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https://bugs.launchpad.net/bugs/1362313

Title:
  a2dp bluetooth music playback broken after bluetooth device reconnect

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