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[digitalangel <1477955@xxxxxxxxxxxxxxxxxx>]

It was a hardware specific problem. This works for my Logitech receiver
and may also work for other brands...

http://ubuntuforums.org/showthread.php?t=1332197

"There are two modes the dongle works in, Embedded and HCI. By default
the embedded is active, which emulates a USB device so it seems to your
PC that your using a normal USB mouse/keyoard.

If you hold the little red Button on the USB BT mini-receiver it will
enable the other mode. Hold the red button on the BT dongle and plug it
into the computer, and after 3-5 seconds of holding the button, the
Bluetooth icon will appear in the system tray.

You can then use the adapter as a BT receiver. The adapter continues to
work in BT mode after reboots, but I think the occasional BT failure
(usually after an update) is caused by the mode changing."

** Changed in: bluez (Ubuntu)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1477955

Title:
  Bluetooth Will Not Find Attached Adaptor Though lsusb Sees It

Status in bluez package in Ubuntu:
  Fix Released

Bug description:
  Upgraded from 12.04 to 14.04 yesterday, where Bluetooth worked fine. I
  had to do a fresh install of 12.04 and 14.04 upgrade broke (second
  attempt worked), so probably lost all of the working Bluetooth
  settings. Makes no sense as PC can see it but not seeing it as
  Bluetooth adaptor.

  hcidump gives “Can't open device: No such device”

  lsusb finds the Logitech Bluetooth mini receiver:

  "Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  Bus 004 Device 004: ID 046d:c70c Logitech, Inc. BT Mini-Receiver (HID proxy mode)
  Bus 004 Device 003: ID 046d:c70b Logitech, Inc. BT Mini-Receiver (HID proxy mode)
  Bus 004 Device 002: ID 046d:0b02 Logitech, Inc. C-UV35 [Bluetooth Mini-Receiver] (HID proxy mode)
  Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub"

  Have all bluez, bluedevil and even Blueman installed (from looking at
  previous issues from people this might have helped).

  Release:        14.04.2 LTS
  Bluetooth version: 4.101-0ubuntu13.1
  Bluedevil: 2.0~rc1really1.3.2.0ubuntu1

  I prefer to use LTS releases than every new release but not sure if
  upgrading will fix the issue anyway!

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: bluetooth 4.101-0ubuntu13.1
  ProcVersionSignature: Ubuntu 3.13.0-58.97-generic 3.13.11-ckt22
  Uname: Linux 3.13.0-58-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.1-0ubuntu3.11
  Architecture: amd64
  CurrentDesktop: KDE
  Date: Fri Jul 24 12:04:41 2015
  InstallationDate: Installed on 2015-07-23 (0 days ago)
  InstallationMedia: Kubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120423)
  InterestingModules: rfcomm bnep bluetooth
  MachineType: System manufacturer System Product Name
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=en_GB:en
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-58-generic root=UUID=47b90882-7cc6-474d-9d54-1539100e1c2c ro quiet splash
  SourcePackage: bluez
  UpgradeStatus: Upgraded to trusty on 2015-07-23 (0 days ago)
  dmi.bios.date: 09/22/2011
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 0604
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: M5A78L LE
  dmi.board.vendor: ASUSTeK Computer INC.
  dmi.board.version: Rev X.0x
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0604:bd09/22/2011:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM5A78LLE:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer
  hciconfig:
   
  rfkill:
   
  syslog:

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