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[Karl Grzeszczak <karl@xxxxxxxxxxx>]

Tried again just now with the Sennheiser Urbanite XL Wireless and see
this in the syslog:

May 10 08:00:02 deathstar wpa_supplicant[1472]: wlp6s0: Failed to initiate sched scan
May 10 08:00:09 deathstar rtkit-daemon[2045]: Supervising 4 threads of 1 processes of 1 users.
May 10 08:00:09 deathstar rtkit-daemon[2045]: Successfully made thread 19868 of process 2461 (n/a) owned by '1000' RT at      priority 5.
May 10 08:00:09 deathstar rtkit-daemon[2045]: Supervising 5 threads of 1 processes of 1 users.
May 10 08:00:09 deathstar kernel: [  505.747613] Bluetooth: hci0 SCO packet for unknown connection handle 0
May 10 08:00:09 deathstar kernel: [  505.747616] Bluetooth: hci0 SCO packet for unknown connection handle 0
May 10 08:00:09 deathstar kernel: [  505.747617] Bluetooth: hci0 SCO packet for unknown connection handle 0
May 10 08:00:14 deathstar pulseaudio[2461]: [pulseaudio] module-bluez5-device.c: Refused to switch profile to a2dp_sink:      Not connected
May 10 08:00:14 deathstar bluetoothd[1176]: Unable to get io data for Headset Voice gateway: getpeername: Transport endpo     int is not connected (107)
May 10 08:00:14 deathstar kernel: [  510.979305] Bluetooth: hci0 SCO packet for unknown connection handle 258
May 10 08:00:21 deathstar bluetoothd[1176]: connect error: Host is down (112)
May 10 08:00:21 deathstar bluetoothd[1176]: GLib: Source ID 197 was not found when attempting to remove it

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Packages, which is subscribed to bluez in Ubuntu.
https://bugs.launchpad.net/bugs/1438510

Title:
  [REGRESSION] bluetooth headset no longer supports a2dp

Status in bluez package in Ubuntu:
  Confirmed
Status in pulseaudio package in Ubuntu:
  Confirmed
Status in bluez source package in Vivid:
  Confirmed
Status in pulseaudio source package in Vivid:
  Confirmed

Bug 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:
  https://bbs.archlinux.org/viewtopic.php?id=194006

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