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[Pilot6 <1462614@xxxxxxxxxxxxxxxxxx>]

OK. Now I see the problem. You need these files

AthrBT_0x11020100.dfu
ramps_0x11020100_40.dfu

Copy them to

/lib/firmware/ar3k/

It should work. If it does get my dkms package installed. It will
rebuild after kernel updates and BT will work.

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https://bugs.launchpad.net/bugs/1462614

Title:
  Atheros bluetooth doesn't find the devices

Status in linux-lts-utopic package in Ubuntu:
  In Progress

Bug description:
  I have a laptop Acer v15 with Qualcom Atheros bluetooth and Logitech
  M557 mouse, which worked well initially. Then after disconnecting the
  mouse, my bluetooth adapter can't find any bluetooth devices nearby
  (I've also tried the Samsung s4).

  This bug is reproducable in Elementary OS 0.3,  Ubuntu 15.04 and 14.04, Mint 17.1 and 17.
  Here are some outputs from terminal:

  $ lsusb
  Bus 002 Device 002: ID 8087:8000 Intel Corp. 
  Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  Bus 001 Device 002: ID 8087:8008 Intel Corp. 
  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
  Bus 003 Device 004: ID 04f2:b474 Chicony Electronics Co., Ltd 
  Bus 003 Device 003: ID 06cb:2970 Synaptics, Inc. 
  Bus 003 Device 002: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
  Bus 003 Device 005: ID 0489:e076 Foxconn / Hon Hai 
  Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

  $ hciconfig
  hci0:   Type: BR/EDR  Bus: USB
      BD Address: C0:38:96:6C:06:7E  ACL MTU: 1022:8  SCO MTU: 183:5
      UP RUNNING PSCAN ISCAN 
      RX bytes:1725 acl:0 sco:0 events:164 errors:0
      TX bytes:3394 acl:0 sco:0 commands:151 errors:0

  $ sudo awk -vRS= '/e076/' /sys/kernel/debug/usb/devices
  T:  Bus=03 Lev=01 Prnt=01 Port=09 Cnt=05 Dev#=  5 Spd=12   MxCh= 0
  D:  Ver= 1.10 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs=  1
  P:  Vendor=0489 ProdID=e076 Rev= 0.01
  C:* #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=100mA
  I:* If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
  E:  Ad=81(I) Atr=03(Int.) MxPS=  16 Ivl=1ms
  E:  Ad=82(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms
  E:  Ad=02(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms
  I:* If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
  E:  Ad=83(I) Atr=01(Isoc) MxPS=   0 Ivl=1ms
  E:  Ad=03(O) Atr=01(Isoc) MxPS=   0 Ivl=1ms
  I:  If#= 1 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
  E:  Ad=83(I) Atr=01(Isoc) MxPS=   9 Ivl=1ms
  E:  Ad=03(O) Atr=01(Isoc) MxPS=   9 Ivl=1ms
  I:  If#= 1 Alt= 2 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
  E:  Ad=83(I) Atr=01(Isoc) MxPS=  17 Ivl=1ms
  E:  Ad=03(O) Atr=01(Isoc) MxPS=  17 Ivl=1ms
  I:  If#= 1 Alt= 3 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
  E:  Ad=83(I) Atr=01(Isoc) MxPS=  25 Ivl=1ms
  E:  Ad=03(O) Atr=01(Isoc) MxPS=  25 Ivl=1ms
  I:  If#= 1 Alt= 4 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
  E:  Ad=83(I) Atr=01(Isoc) MxPS=  33 Ivl=1ms
  E:  Ad=03(O) Atr=01(Isoc) MxPS=  33 Ivl=1ms
  I:  If#= 1 Alt= 5 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
  E:  Ad=83(I) Atr=01(Isoc) MxPS=  49 Ivl=1ms
  E:  Ad=03(O) Atr=01(Isoc) MxPS=  49 Ivl=1ms

  
  Thanks to @Pilot6 for help with debugging this.
  Initial question started on askubuntu.com http://askubuntu.com/questions/632589/bluetooth-doesnt-find-the-devices

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.16.0-38-generic 3.16.0-38.52~14.04.1
  ProcVersionSignature: Ubuntu 3.16.0-38.52~14.04.1-generic 3.16.7-ckt10
  Uname: Linux 3.16.0-38-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.11
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sat Jun  6 14:38:16 2015
  InstallationDate: Installed on 2015-06-06 (0 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
  SourcePackage: linux-lts-utopic
  UpgradeStatus: No upgrade log present (probably fresh install)

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