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[Konrad Zapałowicz <konrad.zapalowicz@xxxxxxxxxxxxx>]

First there are many errors such as: "Not enough free handles to
register service" in the syslog for the Bluetooth service.

Then the attributes of the BLE devices are not read due to the auth
issue: "Error reading Report value: Attribute requires authentication
before read/write"

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https://bugs.launchpad.net/bugs/1557298

Title:
  [Xenial][Bluez5] Low Energy Keyboard is paired incorrectly

Status in Unity Control Center:
  New
Status in bluez package in Ubuntu:
  New

Bug description:
  Failed to pair low energy(bluetooth smart, 4.0 or 4.1) devices
  correctly.

  1. bluetooth smart mouse is being listed as "all type" in bluetooth-
  wizard, however it is able to be paired and use, even repair(i'm
  mentioning this because in some circumstance low energy device can be
  only paired once, bug #1515179)

  2. bluetooth smart keyboard is unable to use after bluetooth-wizard
  says "OK". Also the passcode input is also not acting interactively
  like when pairing with bluetooth 3.0 keyboard.

  Above scenario also being verified with bluetoothctl and blueman.

  -
  More details about versions:

  Environment:
  xenial daily (20160307)
  bluez 5.37-0ubuntu5
  gnome-bluetooth 3.18.2-1ubuntu2
  blueman  2.0.3-1ubuntu1
  bluetooth controller 0cf3:e005 Atheros Communications, Inc. (hci version: 4.1)

  Tested devices:
  Designer Mouse, bluetooth smart (pairable, work, re-pair work)
  Designer Keyboard, bluetooth smart (paired, not working)
  BT3.0 keyboard, bluetooth classic (pair and work)
  BT3.0 mouse, bluetooth classic (pair and work)

  -
  In control environment with the same hardware system and devices:
  trusty 14.04.1 + dist-upgrade (stay with 3.13 kernel)
  bluez5 5.35 (ppa: https://launchpad.net/~vidplace7/+archive/ubuntu/bluez5)

  It works with all above devices but can only be pairing through
  bluetoothctl, since the older bluetooth-wizard does not understand
  bluez 5.x. Everything seems works fine, although there are a lot more
  error messages, but since this bug is more about xenial, please let me
  know if we need more information about this, I'm able to reproduce
  this trusty scenario in anytime.

  -
  Additional note:
  A little clarification, since I'm not sure how far the Bluetooth SIG is going to use Bluetooth Smart(Low Energy, or even Smart-Ready) to cover the versioning, I decided to just use what ever I saw on the product box.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: bluez 5.37-0ubuntu5
  ProcVersionSignature: Ubuntu 4.4.0-12.28-generic 4.4.4
  Uname: Linux 4.4.0-12-generic x86_64
  ApportVersion: 2.20-0ubuntu3
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Tue Mar 15 11:40:12 2016
  InstallationDate: Installed on 2016-03-14 (0 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160307)
  InterestingModules: rfcomm bnep btusb bluetooth
  MachineType: Dell Inc. Latitude E5550
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-12-generic.efi.signed root=UUID=1079eca4-4293-4e51-ba0e-84f7d681cb2c ro quiet splash vt.handoff=7
  SourcePackage: bluez
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/18/2015
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A11
  dmi.board.name: 0141B2
  dmi.board.vendor: Dell Inc.
  dmi.board.version: X02
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA11:bd11/18/2015:svnDellInc.:pnLatitudeE5550:pvr:rvnDellInc.:rn0141B2:rvrX02:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E5550
  dmi.sys.vendor: Dell Inc.
  hciconfig:
   hci0:	Type: BR/EDR  Bus: USB
   	BD Address: 00:71:CC:39:BD:22  ACL MTU: 1022:8  SCO MTU: 183:5
   	UP RUNNING PSCAN ISCAN 
   	RX bytes:862538 acl:39687 sco:0 events:2668 errors:0
   	TX bytes:26235 acl:904 sco:0 commands:1021 errors:0

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