Realtek Bluetooth [0bda:b001] does not work at all on 14.04.2

[Po-Hsu Lin]

CID: 201403-14879 HP 355 G2 Notebook PC

The Bluetooth device on this system does not work at all on 14.04.2
It can't see any other devices.

Steps:
1. Install 14.04.2 + update (3.16.0-40)
2. Click "Set Up New Device..." from the Bluetooth applet
3. Try to pair with any other Bluetooth devices

Expected result:
It should be able to see and pair with other devices.

Actual result:
Nothing could be seen in the device list.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.16.0-40-generic 3.16.0-40.54~14.04.1
ProcVersionSignature: Ubuntu 3.16.0-40.54~14.04.1-generic 3.16.7-ckt11
Uname: Linux 3.16.0-40-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.11
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Jun 12 05:26:17 2015
InstallationDate: Installed on 2015-06-12 (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)
---
ApportVersion: 2.14.1-0ubuntu3.11
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: ubuntu 1599 F.... pulseaudio
 /dev/snd/controlC0: ubuntu 1599 F.... pulseaudio
CurrentDesktop: Unity
DistroRelease: Ubuntu 14.04
HibernationDevice: RESUME=UUID=27046bba-cdf2-4475-873e-005fe871a3f0
InstallationDate: Installed on 2015-06-12 (0 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
MachineType: Hewlett-Packard Presario CQ45 Notebook PC
Package: linux (not installed)
ProcFB:
 0 radeondrmfb
 1 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-40-generic root=UUID=c7162180-a7e3-4d60-b741-af4696d2dd1b ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.16.0-40.54~14.04.1-generic 3.16.7-ckt11
RelatedPackageVersions:
 linux-restricted-modules-3.16.0-40-generic N/A
 linux-backports-modules-3.16.0-40-generic N/A
 linux-firmware 1.127.12
Tags: trusty
Uname: Linux 3.16.0-40-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 04/03/2014
dmi.bios.vendor: Insyde
dmi.bios.version: B.0A
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 22C2
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 86.08
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnInsyde:bvrB.0A:bd04/03/2014:svnHewlett-Packard:pnPresarioCQ45NotebookPC:pvr05A9200000200000000000000:rvnHewlett-Packard:rn22C2:rvrKBCVersion86.08:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.name: Presario CQ45 Notebook PC
dmi.product.version: 05A9200000200000000000000
dmi.sys.vendor: Hewlett-Packard

[Po-Hsu Lin (cypressyew)]

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[Po-Hsu Lin (cypressyew)]

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[Po-Hsu Lin (cypressyew)]

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[Po-Hsu Lin (cypressyew)]

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[Po-Hsu Lin (cypressyew)]

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[Po-Hsu Lin (cypressyew)]

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[Po-Hsu Lin (cypressyew)]

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[Po-Hsu Lin (cypressyew)]

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[Po-Hsu Lin (cypressyew)]

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[Po-Hsu Lin (cypressyew)]

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[Po-Hsu Lin (cypressyew)]

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[Po-Hsu Lin (cypressyew)]

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[Po-Hsu Lin (cypressyew)]

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[Po-Hsu Lin (cypressyew)]

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[Po-Hsu Lin (cypressyew)]

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[Po-Hsu Lin (cypressyew)]

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[Po-Hsu Lin (cypressyew)]

With the DKMS provided in comment #42 of bug 1382404
it could make the Bluetooth work (tested with a Bluetooth headset)

[Pilot6 (hanipouspilot)]

As a workaround I built a ppa with working driver for that module. Install it this way.

sudo add-apt-repository ppa:hanipouspilot/rtlwifi
sudo apt-get update
sudo apt-get install rtl8723au-bt-dkms linux-firmware

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Po-Hsu Lin (cypressyew)]

Verified on Vivid (3.19.0-21), this Bluetooth device does not work as well,
the DKMS provided in comment #42 of bug 1382404 can't be built on it.
Please refer to the attachment for the make error log.

[Pilot6 (hanipouspilot)]

@Po-Hsu Lin

Did you try DKMS from #19? It does build on 3.19.0.21.

To get it work you need to install both BT and Wi-Fi drivers from this repository.

sudo apt-get install rtlwifi-new-dkms rtl8723au-bt-dkms linux-firmware

[Po-Hsu Lin (cypressyew)]

@Pilot6
Hi, with DKMS from #19, it looks like it could make Bluetooth partially work (be able to scan and pair a headset), but the headset is not working properly in both HSP/HFP and A2DP mode. I can't hear the test sound in A2DP mode, and it records nothing but noise in HSP/HFP mode.

[Pilot6 (hanipouspilot)]

@Po-Hsu Lin

Support of these devices has been recently added to bluetooth-next.

http://git.kernel.org/cgit/linux/kernel/git/bluetooth/bluetooth-next.git/commit/drivers/bluetooth/btusb.c?id=a2698a9bf9b0cfcf7e556946e04c4456a13a6f5a

If you have the hardware (I do not), it makes sense to report it to Daniel Drake and Marcel Holtmann to debug.

[Stefan (hessler-dresden)]

This workaround solve bluetooth bug as a interim as long as driver isn't implement into dkms kernel.

Download rtl8723au_bt-master from GitHub, than open terminal and do

make
sudo make install

After restart bluetooth works

best from
Stefan