Blueman 协议不可用

Question

今天我的蓝牙耳机停止工作。我最近没有修改任何东西（虽然前几天我试图让蓝牙耳机在 a2dp 模式下自动连接，这涉及安装 blueman 并重新配对，但自从制作以来我已经连接并重新启动了几次这种变化，一切都在工作）。

现在，当我尝试连接耳机时，我得到：

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

基于这里的一些事情（蓝牙 - 连接失败：blueman.bluez.errors.DBusFailedError：协议不可用）和其他互联网搜索，我试过：

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

我试过重新安装：

$ 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.

当然重新启动，但似乎没有任何帮助，我无法弄清楚它在谈论什么协议，因为我可以看到耳机并与之配对，但无法建立音频连接。

我正在运行 Ubuntu 18.04.1。其他一些细节：

$ 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

关于下一步去哪里的任何建议？谢谢。

Answer 1

对我来说只是通过执行重新加载模块：

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

帮助解决了这个问题。

Answer 2

对我有用的是：（如上文 Luca Mattia Ferrari 所指出的）

$ sudo apt-get purge pulseaudio  
$ rm ~/.config/pulse && sudo killall pulseaudio  
$ sudo apt-get install pulseaudio  
$ pulseaudio --start

以上确保脉冲首先工作。
然后，这个有点奇怪，默认情况下不是pulseaudio本身：

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

我知道有点多余，但这些是 10 分钟前对我有用的确切步骤。
但是好吧，至少它现在有效:)