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[Bug 1519298] [NEW] btusb.ko preferred over ath3k.ko for Atheros AR3012 Bluetooth 4.0

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Public bug reported:

Since upgrading from 14.10 to 15.04 and then 15.10, my Bluetooth is
buggy (e.g., it does not automatically connect to my headphone, needs
manual "turning on" in the indicator applet and some good luck to do
this).

My bluetooth device is

# lsusb | grep Blue
Bus 004 Device 014: ID 0cf3:3004 Atheros Communications, Inc. AR3012 Bluetooth 4.0

I think this device should be handled by ath3k.ko:
# modinfo /lib/modules/$(uname -r)/kernel/drivers/bluetooth/ath3k.ko| grep 3004
alias:          usb:v0CF3p3004d*dc*dsc*dp*ic*isc*ip*in*
alias:          usb:v04CAp3004d*dc*dsc*dp*ic*isc*ip*in*

# uname -r
4.2.0-18-generic

Indeed, ath3k.ko is loaded

# lsmod | grep 'ath3k\|btusb'
ath3k                  20480  0
btusb                  45056  0
btrtl                  16384  1 btusb
btbcm                  16384  1 btusb
btintel                16384  1 btusb
bluetooth             516096  48 bnep,ath3k,btbcm,btrtl,btusb,rfcomm,btintel

However, if I remove ath3k, bluetooth keeps streaming sound to my headphone:
# modprobe -r ath3k
[noting happens]
while, if I remove the generic module
# modprobe -r btusb
the entire bluetooth architechture breaks down, my headphone goes silent, and sound now comes out of the built-in speakers.

I'd hope that if ath3k was actually used, my bluetooth would be less
buggy. What can I do?

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: linux-image-4.2.0-18-generic 4.2.0-18.22
ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3
Uname: Linux 4.2.0-18-generic x86_64
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  axel       3114 F.... pulseaudio
CurrentDesktop: Unity
Date: Tue Nov 24 10:20:54 2015
DistributionChannelDescriptor:
 # This is a distribution channel descriptor
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-somerville-precise-amd64-20120703-2
HibernationDevice: RESUME=UUID=39fd7402-c630-4457-b2aa-6cfd16a1f97a
InstallationDate: Installed on 2013-08-01 (844 days ago)
InstallationMedia: Ubuntu 12.04 "Precise" - Build amd64 LIVE Binary 20120703-15:08
MachineType: Dell Inc. Dell System XPS L322X
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-18-generic root=UUID=ff211774-a9b8-42ab-896c-c542fb10c871 ro quiet splash pcie_aspm=force vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.2.0-18-generic N/A
 linux-backports-modules-4.2.0-18-generic  N/A
 linux-firmware                            1.149.2
RfKill:
 0: phy0: Wireless LAN
 	Soft blocked: no
 	Hard blocked: no
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/18/2013
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A08
dmi.board.name: 0PJHXN
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: 0.1
dmi.modalias: dmi:bvnDellInc.:bvrA08:bd04/18/2013:svnDellInc.:pnDellSystemXPSL322X:pvr:rvnDellInc.:rn0PJHXN:rvrA00:cvnDellInc.:ct8:cvr0.1:
dmi.product.name: Dell System XPS L322X
dmi.sys.vendor: Dell Inc.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug wily

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1519298

Title:
  btusb.ko preferred over ath3k.ko for Atheros  AR3012 Bluetooth 4.0

Status in linux package in Ubuntu:
  New

Bug description:
  Since upgrading from 14.10 to 15.04 and then 15.10, my Bluetooth is
  buggy (e.g., it does not automatically connect to my headphone, needs
  manual "turning on" in the indicator applet and some good luck to do
  this).

  My bluetooth device is

  # lsusb | grep Blue
  Bus 004 Device 014: ID 0cf3:3004 Atheros Communications, Inc. AR3012 Bluetooth 4.0

  I think this device should be handled by ath3k.ko:
  # modinfo /lib/modules/$(uname -r)/kernel/drivers/bluetooth/ath3k.ko| grep 3004
  alias:          usb:v0CF3p3004d*dc*dsc*dp*ic*isc*ip*in*
  alias:          usb:v04CAp3004d*dc*dsc*dp*ic*isc*ip*in*

  # uname -r
  4.2.0-18-generic

  Indeed, ath3k.ko is loaded

  # lsmod | grep 'ath3k\|btusb'
  ath3k                  20480  0
  btusb                  45056  0
  btrtl                  16384  1 btusb
  btbcm                  16384  1 btusb
  btintel                16384  1 btusb
  bluetooth             516096  48 bnep,ath3k,btbcm,btrtl,btusb,rfcomm,btintel

  However, if I remove ath3k, bluetooth keeps streaming sound to my headphone:
  # modprobe -r ath3k
  [noting happens]
  while, if I remove the generic module
  # modprobe -r btusb
  the entire bluetooth architechture breaks down, my headphone goes silent, and sound now comes out of the built-in speakers.

  I'd hope that if ath3k was actually used, my bluetooth would be less
  buggy. What can I do?

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: linux-image-4.2.0-18-generic 4.2.0-18.22
  ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3
  Uname: Linux 4.2.0-18-generic x86_64
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  axel       3114 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Tue Nov 24 10:20:54 2015
  DistributionChannelDescriptor:
   # This is a distribution channel descriptor
   # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
   canonical-oem-somerville-precise-amd64-20120703-2
  HibernationDevice: RESUME=UUID=39fd7402-c630-4457-b2aa-6cfd16a1f97a
  InstallationDate: Installed on 2013-08-01 (844 days ago)
  InstallationMedia: Ubuntu 12.04 "Precise" - Build amd64 LIVE Binary 20120703-15:08
  MachineType: Dell Inc. Dell System XPS L322X
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-18-generic root=UUID=ff211774-a9b8-42ab-896c-c542fb10c871 ro quiet splash pcie_aspm=force vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-18-generic N/A
   linux-backports-modules-4.2.0-18-generic  N/A
   linux-firmware                            1.149.2
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/18/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A08
  dmi.board.name: 0PJHXN
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnDellInc.:bvrA08:bd04/18/2013:svnDellInc.:pnDellSystemXPSL322X:pvr:rvnDellInc.:rn0PJHXN:rvrA00:cvnDellInc.:ct8:cvr0.1:
  dmi.product.name: Dell System XPS L322X
  dmi.sys.vendor: Dell Inc.

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