Month: August 2020

18.04 – Blueman Protocol not available

Jovan Stosic August 23, 2020

Today my bluetooth headset stopped working. I haven’t modified anything recently (although a few days ago I was trying to get a bluetooth headset to automatically connect in a2dp mode, which involved installing blueman and re-pairing with it, but I’ve connected and rebooted several times since making that change and everything was working).

Now when I try to connect the headset I get:

Connection Failed: blueman.bluez.errors.DBusFailedError: Protocol Not available

Based on a few things from here (Bluetooth – Connection Failed: blueman.bluez.errors.DBusFailedError: Protocol Not available) and other Internet searches, I’ve tried:

$ sudo apt-get install pulseaudio-module-bluetooth
$ pactl load-module module-bluetooth-discover

And I’ve tried reinstalling things:

$ sudo apt-get --purge --reinstall install bluetooth bluez blueman pulseaudio pulseaudio-module-bluetooth
$ sudo /etc/init.d/networking restart
    [ ok ] Restarting networking (via systemctl): networking.service.
$ sudo /etc/init.d/bluetooth restart
    [ ok ] Restarting bluetooth (via systemctl): bluetooth.service.

And of course rebooting, but nothing seems to help, and I can’t figure out what protocol it’s talking about, since I can see the headset and pair with it, but not make an audio connection.

I’m running Ubuntu 18.04.1. Some other details:

$ dpkg -l | grep blue
    blueman                            2.0.5-1ubuntu1    
    bluetooth                          5.48-0ubuntu3.1
    bluez                              5.48-0ubuntu3.1
    bluez-cups                         5.48-0ubuntu3.1
    bluez-obexd                        5.48-0ubuntu3.1
    gir1.2-gnomebluetooth-1.0:amd64    3.28.0-2ubuntu0.1
    gnome-bluetooth                    3.28.0-2ubuntu0.1
    indicator-bluetooth                0.0.6+17.10.20170605-0ubuntu3                
    libbluetooth3:amd64                5.48-0ubuntu3.1                              
    libgnome-bluetooth13:amd64         3.28.0-2ubuntu0.1
    pulseaudio-module-bluetooth        1:11.1-1ubuntu7.1

$ sudo service bluetooth status
* bluetooth.service - Bluetooth service    Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset    Active: active (running) since Mon 2019-02-04 14:36:47 PST; 1min 13s ago
     Docs: man:bluetoothd(8)  Main PID: 6912 (bluetoothd)    Status: "Running"
    Tasks: 1 (limit: 4915)    CGroup: /system.slice/bluetooth.service
           └─6912 /usr/lib/bluetooth/bluetoothd

Feb 04 14:36:47 AVB systemd[1]: Starting Bluetooth service... Feb 04 14:36:47 AVB bluetoothd[6912]: Bluetooth daemon 5.48 Feb 04 14:36:47 AVB systemd[1]: Started Bluetooth service. Feb 04 14:36:47 AVB bluetoothd[6912]: Starting SDP server Feb 04 14:36:47 AVB bluetoothd[6912]: Bluetooth management interface 1.14 initialized

$ dmesg | grep Bluetooth
    [    5.197632] Bluetooth: Core ver 2.22
    [    5.197654] Bluetooth: HCI device and connection manager initialized
    [    5.197657] Bluetooth: HCI socket layer initialized
    [    5.197660] Bluetooth: L2CAP socket layer initialized
    [    5.197664] Bluetooth: SCO socket layer initialized
    [    5.349217] Bluetooth: hci0: Firmware revision 0.1 build 185 week 49 2017
    [    5.492623] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
    [    5.492625] Bluetooth: BNEP filters: protocol multicast
    [    5.492628] Bluetooth: BNEP socket layer initialized
    [   16.972106] Bluetooth: RFCOMM TTY layer initialized
    [   16.972113] Bluetooth: RFCOMM socket layer initialized
    [   16.972117] Bluetooth: RFCOMM ver 1.11
    [   84.672241] Bluetooth: hci0: last event is not cmd complete (0x0f)

$ hciconfig
    hci0:    Type: Primary  Bus: USB
    BD Address: 74:70:FD:B6:73:0C  ACL MTU: 1021:4  SCO MTU: 96:6
    UP RUNNING PSCAN ISCAN INQUIRY
    RX bytes:18753 acl:61 sco:0 events:738 errors:0
    TX bytes:14257 acl:60 sco:0 commands:267 errors:0

$ lspci -knn | grep Net -A3
    02:00.0 Network controller [0280]: Intel Corporation Wireless 8265 / 8275 [8086:24fd] (rev 78)
    Subsystem: Intel Corporation Dual Band Wireless-AC 8265 [8086:0010]
    Kernel driver in use: iwlwifi
    Kernel modules: iwlwifi

$ lsusb
    Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
    Bus 001 Device 003: ID 8087:0a2b Intel Corp.
    Bus 001 Device 002: ID 13d3:5a07 IMC Networks
    Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

$ ps aux | grep blue
    me        2032  0.0  0.6 694048 54240 tty2     Sl+  14:19   0:01 /usr/bin/python3 /usr/bin/blueman-applet
    me        2091  0.0  0.0  82728  6832 ?        Ss   14:19   0:00 /usr/lib/bluetooth/obexd
    root      6912  0.0  0.0  37992  6096 ?        Ss   14:36   0:02 /usr/lib/bluetooth/bluetoothd

Any suggestions on where to look next? Thanks.

 
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  • 3
    I might have solved this myself. “sudo apt install pulseaudio-module-bluetooth” and then restarting pulse audio (“pulseaudio -k” “pulseaudio –start”) and the error goes away. I still have no idea why this is necessary or what the error originally meant. – M. P. Feb 5 ’19 at 17:53

2 Answers

ActiveOldestVotes

20

For me just reloading the module by executing:

pactl unload-module module-bluetooth-discover
pactl load-module module-bluetooth-discover

helped solving the issue.

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  • 4
    Works with 19.04 too. The module must be unloaded first pactl unload-module module-bluetooth-discover. – Vladimir Botka Oct 4 ’19 at 14:59
  • This is the only thing that worked for me with my Bose 700 headphones using blueman on cinnamon. Didn’t even have to restart bluetooth service and didn’t have to run the commands above as root. – Plasty Grove Jul 28 at 2:56

1

Just delete the device on bluetooth manager and pair again. Works for me.

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Source: 18.04 – Blueman Protocol not available – Ask Ubuntu

18.04 – Blueman Protocol not available was last modified: August 23rd, 2020 by Jovan Stosic

HardwareSupportComponentsBluetoothUsbAdapters – Ubuntu Wiki

Jovan Stosic August 23, 2020

Introduction

This page lists some of the Bluetooth USB Adapters that work on Ubuntu. For help with Bluetooth in Ubuntu, see the community documentation on Setting up Bluetooth. You may also want to consider purchasing a free software compatible device. Unlike non-free driver dependent hardware support exists out of the box and will continue working going forward. Many other Bluetooth dongles will not. Free software compatible adapters are available from stores such as ThinkPenguin.com.

To get information about you BlueTooth device use commands:

$ lsusb
...
Bus 002 Device 005: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)
...
$ hciconfig
hci0:   Type: USB
...
$ hciconfig -a hci0
...
        Manufacturer: Accel Semiconductor Ltd. (74)

Source: HardwareSupportComponentsBluetoothUsbAdapters – Ubuntu Wiki

HardwareSupportComponentsBluetoothUsbAdapters – Ubuntu Wiki was last modified: August 23rd, 2020 by Jovan Stosic