我使用的是 linux 内核 v4.4.0-148 和 bluez v5.36。
我无法与我的蓝牙耳机 Muse“M-260 BT”配对或连接bluetoothctl：
$ bluetoothctl
[NEW] Controller 34:E6:AD:A1:9B:8A seb-C70D-B-311 [default]
[bluetooth]# power on
[CHG] Controller 34:E6:AD:A1:9B:8A Class: 0x00010c
Changing power on succeeded
[CHG] Controller 34:E6:AD:A1:9B:8A Powered: yes
[bluetooth]# scan on
Discovery started
[CHG] Controller 34:E6:AD:A1:9B:8A Discovering: yes
[NEW] Device 00:13:09:01:19:61 M-260 BT
[bluetooth]# scan off
[CHG] Device 00:13:09:01:19:61 RSSI is nil
[CHG] Controller 34:E6:AD:A1:9B:8A Discovering: no
Discovery stopped
[bluetooth]# pair 00:13:09:01:19:61
Attempting to pair with 00:13:09:01:19:61
[CHG] Device 00:13:09:01:19:61 Connected: yes
[CHG] Device 00:13:09:01:19:61 Connected: no
[CHG] Device 00:13:09:01:19:61 UUIDs: 00001108-0000-1000-8000-00805f9b34fb
[CHG] Device 00:13:09:01:19:61 UUIDs: 0000110b-0000-1000-8000-00805f9b34fb
[CHG] Device 00:13:09:01:19:61 UUIDs: 0000110c-0000-1000-8000-00805f9b34fb
[CHG] Device 00:13:09:01:19:61 UUIDs: 0000110e-0000-1000-8000-00805f9b34fb
[CHG] Device 00:13:09:01:19:61 UUIDs: 0000111e-0000-1000-8000-00805f9b34fb
[CHG] Device 00:13:09:01:19:61 Paired: yes
Pairing successful
[CHG] Device 00:13:09:01:19:61 Connected: no
[bluetooth]# paired-devices
Device 00:13:09:01:19:61 M-260 BT
[bluetooth]# connect 00:13:09:01:19:61
Attempting to connect to 00:13:09:01:19:61
Failed to connect: org.bluez.Error.Failed
[bluetooth]# quit
[DEL] Controller 34:E6:AD:A1:9B:8A seb-C70D-B-311 [default]
蓝牙服务正在运行：
$ sudo initctl status bluetooth
bluetooth start/spawned, process 1628
但系统日志显示bluetoothd[1628]: a2dp-sink profile connect failed for 00:13:09:01:19:61: Protocol not available尽管该pulseaudio-module-bluetooth软件包已安装：
$ grep bluetoothd /var/log/syslog | tail -5
Jun 30 17:25:31 seb-C70D-B-311 bluetoothd[1628]: Failed to obtain handles for "Service Changed" characteristic
Jun 30 17:53:44 seb-C70D-B-311 bluetoothd[1628]: a2dp-sink profile connect failed for 00:13:09:01:19:61: Protocol not available
Jun 30 17:53:52 seb-C70D-B-311 bluetoothd[1628]: a2dp-sink profile connect failed for 00:13:09:01:19:61: Protocol not available
Jun 30 18:01:57 seb-C70D-B-311 bluetoothd[1628]: Failed to confirm name for hci0: Failed (0x03)
Jun 30 18:08:20 seb-C70D-B-311 bluetoothd[1628]: a2dp-sink profile connect failed for 00:13:09:01:19:61: Protocol not available
$ dpkg -l pulseaudio-module-bluetooth
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-===============================-====================-====================-===================================================================
ii pulseaudio-module-bluetooth 1:4.0-0ubuntu11 amd64 Bluetooth module for PulseAudio sound server
EDIT0：注意到module-bluetooth-discover未加载，所以我尝试加载它，但失败了：
$ pactl list modules short | grep module-bluetooth-discover
$ pactl load-module module-bluetooth-discover
Failure: Module initialization failed
你能帮助我吗 ？
答案1
我解决了我的pb。通过更新pulseaudio-module-bluetooth包Launchpad PPA：tigerite/bluez5 PPA:
$ wget -nv https://launchpad.net/~tigerite/+archive/ubuntu/bluez5/+files/pulseaudio-module-bluetooth_6.0-0ubuntu6ppa4_amd64.deb
2020-08-30 00:23:20 URL:https://launchpad.net/~tigerite/+archive/ubuntu/bluez5/+files/pulseaudio-module-bluetooth_6.0-0ubuntu6ppa4_amd64.deb [112370/112370] -> "pulseaudio-module-bluetooth_6.0-0ubuntu6ppa4_amd64.deb" [1]
$ sudo gdebi -n pulseaudio-module-bluetooth_6.0-0ubuntu6ppa4_amd64.deb
Reading package lists... Done
Building dependency tree
Reading state information... Done
Building data structures... Done
Building data structures... Done
(Reading database ... 588813 files and directories currently installed.)
Preparing to unpack pulseaudio-module-bluetooth_6.0-0ubuntu6ppa4_amd64.deb ...
Unpacking pulseaudio-module-bluetooth (1:6.0-0ubuntu6ppa4) over (1:4.0-0ubuntu11) ...
Setting up pulseaudio-module-bluetooth (1:6.0-0ubuntu6ppa4) ...
$ pactl load-module module-bluetooth-discover
39
$ pactl list modules short | grep module-bluetooth
38 module-bluetooth-policy
39 module-bluetooth-discover
现在它工作正常：
$ bluetoothctl
[NEW] Controller 34:E6:AD:A1:9B:8A seb-C70D-B-311 [default]
[NEW] Device 00:13:09:01:19:61 M-260 BT
[bluetooth]# connect 00:13:09:01:19:61
Attempting to connect to 00:13:09:01:19:61
[CHG] Device 00:13:09:01:19:61 Connected: yes
Connection successful
[M-260 BT]#