Bluetooth HSP/HFP not working but A2DP is

Question

I have a Broadcom internal bluetooth adapter. It is model BCM20702A0 (Vendor=0a5c ProdID=21e1 Rev=01.12) I am able to get the A2DP function to operate but not the HSP/HFP mode. I have tried different firmware and also different configs under /etc/bluetooth/audio.conf but have had no luck. Does anyone have any idea what I can do? I have searched and searched google and tried various things going on two hours. Thought I would give you gurus a try. Below are my system details, please let me know if you need anything else.

dylan@laptop:~$ uname -a
Linux laptop 3.19.0-20-generic #20-Ubuntu SMP Fri May 29 10:10:47 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux


dylan@laptop:~$ dmesg | grep Bluetooth
[    4.179038] Bluetooth: Core ver 2.20
[    4.179051] Bluetooth: HCI device and connection manager initialized
[    4.179054] Bluetooth: HCI socket layer initialized
[    4.179056] Bluetooth: L2CAP socket layer initialized
[    4.179060] Bluetooth: SCO socket layer initialized
[    5.501272] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[    5.501275] Bluetooth: BNEP filters: protocol multicast
[    5.501281] Bluetooth: BNEP socket layer initialized
[    5.508181] Bluetooth: RFCOMM TTY layer initialized
[    5.508188] Bluetooth: RFCOMM socket layer initialized
[    5.508193] Bluetooth: RFCOMM ver 1.11

USB-DEVICES...
T:  Bus=04 Lev=02 Prnt=02 Port=05 Cnt=01 Dev#=  3 Spd=12  MxCh= 0
D:  Ver= 2.00 Cls=ff(vend.) Sub=01 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=0a5c ProdID=21e1 Rev=01.12
S:  Manufacturer=Broadcom Corp
S:  Product=BCM20702A0
S:  SerialNumber=083E8E9B280C
C:  #Ifs= 4 Cfg#= 1 Atr=e0 MxPwr=0mA
I:  If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=01 Prot=01 Driver=btusb
I:  If#= 1 Alt= 2 #EPs= 2 Cls=ff(vend.) Sub=01 Prot=01 Driver=btusb
I:  If#= 2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
I:  If#= 3 Alt= 0 #EPs= 0 Cls=fe(app. ) Sub=01 Prot=01 Driver=(none)


dylan@laptop:~$ dkms status; uname -a
bcmwl, 6.30.223.248+bdcom, 3.19.0-16-generic, x86_64: installed
bcmwl, 6.30.223.248+bdcom, 3.19.0-18-generic, x86_64: installed
bcmwl, 6.30.223.248+bdcom, 3.19.0-20-generic, x86_64: installed
bcmwl, 6.30.223.248+bdcom, 3.19.0-21-generic, x86_64: installed
vboxhost, 4.3.28, 3.19.0-16-generic, x86_64: installed
vboxhost, 4.3.28, 3.19.0-18-generic, x86_64: installed
vboxhost, 4.3.28, 3.19.0-20-generic, x86_64: installed
vboxhost, 4.3.28, 3.19.0-21-generic, x86_64: installed
Linux laptop 3.19.0-21-generic #21-Ubuntu SMP Sun Jun 14 18:31:11 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux


dylan@laptop:~$ dmesg | grep -i bluetooth; dmesg | grep firmware
[    4.085160] Bluetooth: Core ver 2.20
[    4.085171] Bluetooth: HCI device and connection manager initialized
[    4.085175] Bluetooth: HCI socket layer initialized
[    4.085176] Bluetooth: L2CAP socket layer initialized
[    4.085181] Bluetooth: SCO socket layer initialized
[    4.109764] bluetooth hci0: Direct firmware load for brcm/BCM20702A0-0a5c-21e1.hcd failed with error -2
[    4.109773] Bluetooth: hci0: BCM: patch brcm/BCM20702A0-0a5c-21e1.hcd not found
[    5.332794] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[    5.332797] Bluetooth: BNEP filters: protocol multicast
[    5.332803] Bluetooth: BNEP socket layer initialized
[    5.346411] Bluetooth: RFCOMM TTY layer initialized
[    5.346419] Bluetooth: RFCOMM socket layer initialized
[    5.346425] Bluetooth: RFCOMM ver 1.11
[    4.109764] bluetooth hci0: Direct firmware load for brcm/BCM20702A0-0a5c-21e1.hcd failed with error -2

Answer 1

I would try this:

wget https://www.dropbox.com/s/owropuric6iz898/BCM20702A0-05ac-21e1.hcd
sudo cp BCM20702A0-05ac-21e1.hcd /lib/firmware/brcm/BCM20702A0-0a5c-21e1.hcd
sudo modprobe -r btusb
sudo modprobe btusb

Then check dmesg | tail for any info:

sudo apt-get install linux-headers-$(uname -r) build-essential
wget https://www.dropbox.com/s/xu80svavlazttaf/bluetooth-3.19.tar.gz
tar xpvf bluetooth-3.19.tar.gz
cd bluetooth
cp /boot/config-$(uname -r) .config
cp /usr/src/linux-headers-$(uname -r)/Module.symvers Module.symvers
make -C /lib/modules/$(uname -r)/build M=$PWD modules
sudo cp btusb.ko /lib/modules/$(uname -r)/kernel/drivers/bluetooth/
sudo modprobe -r btusb
sudo modprobe btusb

See if it works

You will lose the HSP/HFP after a kernel update. When that happens, you should do:

cd bluetooth
make -C /lib/modules/$(uname -r)/build M=$PWD clean
cp /boot/config-$(uname -r) .config
cp /usr/src/linux-headers-$(uname -r)/Module.symvers Module.symvers
make -C /lib/modules/$(uname -r)/build M=$PWD modules
sudo cp btusb.ko /lib/modules/$(uname -r)/kernel/drivers/bluetooth/
sudo modprobe -r btusb
sudo modprobe btusb

Answer 2

My guess is that it's a bt profile problem with pulseaudio, unless it's something more problematic.

Install and run pavucontrol (apt-get install pavucontrol) and go to the last page (configuration) check if bluetooth profile is there and try changing it.

My bt audio conf is default withoyt any changes (ubuntu 14.04) /etc/bluetooth/audio.conf

Now, Just tested these steps with a bt-headset (a2dp and hsp capabel) and got it working. Not the best way, but worked.

1. Pair bt-device
2. Check with pavucontrol that profile is HSP from configuration page.
3. Start skype (I know, but it's easy to test with it)
4. Run movesink.sh script
5. Start test call to skype testing service
6. Select recording tab from pavucontrol and select "Skype input from" to match your bluetooth device.
7. Speak and see if the volume bar moves.
8. If probles, start call again and run movesink.sh during the test call

a) Check bt-device name:

pactl list sinks|grep Name
# or
pactl list sinks|grep card:

b) Run movesinks.sh with that name

./movesink.sh bluez_sink.48_C1_AC_C1_C3_85.hsp
# or
./movesink.sh bluez_sink.48_C1_AC_C1_C3_85

And here's the movesink.sh script that I've made. It moves your program sound outputting to your bt device (this does not move mic automatically from integrated to bt-headset):

#!/bin/bash 
echo "Setting default sink to: $1";
# where new pa should output sound for new programs
pacmd set-default-sink $1
# get "active" programs and with while read
pactl list sink-inputs short |cut -f1 | while read line    
do
echo "Moving input: ";
echo $line
#| cut -f2 -d' ';
echo "to sink: $1";
#  move audio to the newly assigned output.
pacmd move-sink-input `echo $line | cut -f2 -d' '` $1

done

Hopefully this will verify that your setup works. (I used to have a keybinding, that paired the bt-headset, moved inputs to that and when I used it again, it reverted that setup.)

You should get your main audio back to default with:

./movesink.sh alsa_output.pci-0000_00_1b.0.analog-stereo
# or
./movesink.sh alsa_output.pci-0000_00_1b.0