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[Daniel van Vugt <1490347@xxxxxxxxxxxxxxxxxx>]

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** Changed in: bluez (Ubuntu)
       Status: Triaged => Won't Fix

** Changed in: bluez (Ubuntu Xenial)
       Status: Confirmed => Won't Fix

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https://bugs.launchpad.net/bugs/1490347

Title:
  [Regression] 16:04 and later - Cannot pair with devices using (legacy
  LMP Link Management Protocol) PIN codes

Status in bluez package in Ubuntu:
  Won't Fix
Status in bluez source package in Xenial:
  Won't Fix

Bug description:
  Bluez 5.3 does not have support for pairing with devices (such as
  keyboards) that use a PIN code for pairing.

  A mouse pairs correctly.

  From my research it seems as if the ChromeOS project developed patches
  to fix this and they are supposed to have been included in Bluez 5.4
  (that statement dated April 2013) but I've not yet identified them.

  "The agent's implementation in bt_console/bluetoothctl upstream is
  incomplete, missing some functions like DisplayPincode."

  https://code.google.com/p/chromium/issues/detail?id=222661

  Along with the loss of Headset profiles meaning VoIP applications can
  no longer use HSP/HFP profiles (requiring functionality yet to land in
  Ofono) this cripples the use of Bluetooth for much else than A2DP or
  mouse input.

  Attempting to pair with, for example, an Apple Wireless Keyboard that
  pairs and works correctly with 14.04 LTS, fails totally on 15.10.

  The mouse shown below is already paired, connected, and working.

  $ bluetoothctl
  [NEW] Controller 00:1F:3A:E0:0A:AF hephaestion.lan.iam.tj [default]
  [NEW] Device 00:0A:95:4B:BD:C2 Apple Wireless Keyboard
  [NEW] Device 00:07:61:3B:86:98 Bluetooth Travel Mouse
  [bluetooth]# agent on
  Agent registered
  [bluetooth]# default-agent
  Default agent request successful
  [bluetooth]# scan on
  Discovery started
  [CHG] Controller 00:1F:3A:E0:0A:AF Discovering: yes
  [CHG] Device 00:0A:95:4B:BD:C2 LegacyPairing: yes
  [CHG] Device 00:0A:95:4B:BD:C2 RSSI: -48
  [bluetooth]# pair 00:0A:95:4B:BD:C2
  Attempting to pair with 00:0A:95:4B:BD:C2

  >>> at this point nothing is happening

  >>> so I press Enter on the keyboard and...
  [agent] PIN code: 791166
  >>> I type 791166 Enter and ...
  [agent] PIN code: 237744
  >>> I type 237744 Enter and...
  [agent] PIN code: 358866
  >>> I type 358866 Enter and...
  Request PIN code
  [agent] Enter PIN code: 1234
  >>> I type 1234 Enter on the keyboard and 1234 at the prompt...
  Failed to pair: org.bluez.Error.AuthenticationFailed

  This cycle repeats in various permuations. Sometimes the final
  "Request PIN code" does not appear.

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