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[Konrad Zapałowicz <konrad.zapalowicz@xxxxxxxxxxxxx>]

I have analyzed the syslog and must say that this is a strange one to
figure out.

There is a strange line in the syslog saying that the error is "Device
or respurce busy" and it happens for many actions such as SDP Query for
example. It is reported for bonding attempts which fail with code either
3 [first] or 2 [2nd and following] which is respectively a Remote
Disconnection and Local Disconnection.

This is some kind of race as the "Device or resource busy" first happens
after the bonding attempt is disconnected from the remote side.

What happens in the syslog:

1. Devices Jabra, Mouse, Seat created from storage. Devices set_bonded()
2. Probing profiles for all of the created devices.
    ) Seat: PAN, Media Control, A2DP source & sink
    ) Mouse: Input
    ) Jabra: nothing returned ??
3. Devices added to whitelist
4. Probing profiles 
5. Disconnected device Jabra [bonding failed] reason 3 [remote disconnected]
6. Attempt to probe hfp_ag for Jabra, failed. SDP returns Device or resource busy.
7. Deiscovered Audi, bonding/connection fails as above.

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Packages, which is subscribed to bluez in Ubuntu.
https://bugs.launchpad.net/bugs/1500242

Title:
  Bluetooth devices (Jabra BT250, Audi A3 car kit) can not be connected
  with BQ Aquaris 4.5

Status in Canonical System Image:
  In Progress
Status in bluez package in Ubuntu:
  Confirmed
Status in ofono package in Ubuntu:
  Incomplete

Bug description:
  STEPS:
  Requirements: Aquaris E4.5, Jabra BT250 blue tooth handset device (rather old one supports blue tooth 1.1 and therefore I thought should be no issue) or Audi car kit (A3 2012 model)

  1. Put Jabra BT250 into receiving mode
  2. Phone searches automatically every 15 - 30 seconds for a new blue tooth device
  3. Phone finds Jabra BT250 and asks for pairing code
  4. Enter code into phone
  5. Jabra BT250 automatically exits the pairing mode (which is a sign that pairing should have worked)
  6. Phone looses connection to Jabra BT250
  7. Manual reconnection via phone works (shows Jabra BT250 as being connected) but ignores the device

  Same behaviour with Audi car kit (Audi A3, 2012 model)

  EXPECTED:
  I expect that the blue tooth kits work similar to my Seat Alhambra (also 2012 model) where the blue tooth pairing etc. works great (except some bugs which are already filed).

  ACTUAL:
  No connection to the blue tooth device

  VERSIONS:
  OS-Build-Number: 25
  Ubuntu-Image: 20150825.1

  POSSIBLE ROOT CAUSE:
  Is this issue also solved as soon as bluez5 is implemented? When will this be?

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