我似乎即将让我的 Beoplay P2 蓝牙扬声器与我的 Ubuntu / KDE 笔记本电脑配合使用：
所有蓝牙实用程序都同意扬声器已连接。例如，bluetoothctls启动输出包括：
[NEW] Device 04:FE:A1:4B:0F:EA Fenchurch
这是扬声器设备。 （它的名字是Fenchurch。）当我询问更多细节时，我得到的似乎是合理的：
[bluetooth]# info 04:FE:A1:4B:0F:EA
Device 04:FE:A1:4B:0F:EA
Name: Fenchurch
Alias: Fenchurch
Class: 0x240414
Icon: audio-card
Paired: yes
Trusted: yes
Blocked: no
Connected: yes
LegacyPairing: no
UUID: Headset (00001108-0000-1000-8000-00805f9b34fb)
UUID: Audio Sink (0000110b-0000-1000-8000-00805f9b34fb)
UUID: A/V Remote Control Target (0000110c-0000-1000-8000-00805f9b34fb)
UUID: Advanced Audio Distribu.. (0000110d-0000-1000-8000-00805f9b34fb)
UUID: A/V Remote Control (0000110e-0000-1000-8000-00805f9b34fb)
UUID: Handsfree (0000111e-0000-1000-8000-00805f9b34fb)
UUID: PnP Information (00001200-0000-1000-8000-00805f9b34fb)
Modalias: bluetooth:v0103p1005d0100
KDE蓝牙配置还声称已连接扬声器，并且扬声器本身有指示灯表示同意。
该设备出现在 Plasma 音频音量小部件中：
它也出现在pavuctl：
更诱人的是，当我调节音量时pavuctl，扬声器本身会发出确认音！但这是我可以让它播放的唯一声音。
正如我所期望的那样，声音从笔记本电脑的内置扬声器中发出。
我应该调查什么？你下一步怎么做？
更多信息，或者可能是转移注意力的信息：
- 我的手机可以毫无困难地连接到扬声器并通过它播放。
- 事实上，当我在笔记本电脑和手机上打开 Spotify 时，Spotify 可以告诉手机播放来自连接的蓝牙扬声器的音乐！
- 当我禁用手机的蓝牙连接以确保扬声器已连接到笔记本电脑时，它会显示绿色指示灯而不是白色指示灯。这意味着它处于“免提”模式。我不确定这与普通演讲者有何不同。
alsamixer说只有一张声卡。它看起来像这样：
我可以通过输入正确的名称让它识别 P2，但我不知道如何找到该名称。
根据以下请求，以下是输出systemctl status bluetooth：
● bluetooth.service - Bluetooth service
Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
Active: active (running) since Fri 2018-07-27 11:09:02 EDT; 9min ago
Docs: man:bluetoothd(8)
Main PID: 915 (bluetoothd)
Status: "Running"
CGroup: /system.slice/bluetooth.service
└─915 /usr/lib/bluetooth/bluetoothd
Jul 27 11:14:40 avocet bluetoothd[915]: Unable to register GATT service with handle 0x0017 for device 04:FE:A1:4B:0F:EA
Jul 27 11:14:40 avocet bluetoothd[915]: Unable to register GATT service with handle 0x003d for device 04:FE:A1:4B:0F:EA
Jul 27 11:15:21 avocet bluetoothd[915]: Endpoint unregistered: sender=:1.56 path=/MediaEndpoint/A2DPSource
Jul 27 11:15:21 avocet bluetoothd[915]: Endpoint unregistered: sender=:1.56 path=/MediaEndpoint/A2DPSink
Jul 27 11:15:21 avocet bluetoothd[915]: Endpoint registered: sender=:1.77 path=/MediaEndpoint/A2DPSource
Jul 27 11:15:21 avocet bluetoothd[915]: Endpoint registered: sender=:1.77 path=/MediaEndpoint/A2DPSink
Jul 27 11:15:41 avocet bluetoothd[915]: Unable to register GATT service with handle 0x000a for device 04:FE:A1:4B:0F:EA
Jul 27 11:15:41 avocet bluetoothd[915]: Unable to register GATT service with handle 0x0013 for device 04:FE:A1:4B:0F:EA
Jul 27 11:15:41 avocet bluetoothd[915]: Unable to register GATT service with handle 0x0017 for device 04:FE:A1:4B:0F:EA
Jul 27 11:15:41 avocet bluetoothd[915]: Unable to register GATT service with handle 0x003d for device 04:FE:A1:4B:0F:EA
这是输出journalctl -n 50：
-- Logs begin at Fri 2018-07-27 11:09:01 EDT, end at Fri 2018-07-27 11:17:01 EDT. --
Jul 27 11:10:10 avocet org.kde.kdeconnect[1527]: kdeconnect.plugin.notification: removeNotification "0|com.spotify.music|2131363975|null|10143"
Jul 27 11:10:10 avocet org.kde.kdeconnect[1527]: kdeconnect.core: "The remote host closed the connection"
Jul 27 11:10:10 avocet org.kde.kdeconnect[1527]: kdeconnect.core: "The remote host closed the connection"
Jul 27 11:12:31 avocet org.kubuntu.DriverManager[1527]: Traceback (most recent call last):
Jul 27 11:12:31 avocet org.kubuntu.DriverManager[1527]: File "/usr/lib/x86_64-linux-gnu/libexec/DriverManager_DBus", line 24, in <module>
Jul 27 11:12:31 avocet org.kubuntu.DriverManager[1527]: import dbus
Jul 27 11:12:31 avocet org.kubuntu.DriverManager[1527]: ModuleNotFoundError: No module named 'dbus'
Jul 27 11:14:00 avocet org.kde.kdeconnect[1527]: kdeconnect.plugin.notification: Destroying NotificationsPlugin
Jul 27 11:14:00 avocet org.kde.kdeconnect[1527]: kdeconnect.plugin.notification: Destroying NotificationsListener
Jul 27 11:14:40 avocet bluetoothd[915]: Unable to register GATT service with handle 0x000a for device 04:FE:A1:4B:0F:EA
Jul 27 11:14:40 avocet bluetoothd[915]: Unable to register GATT service with handle 0x0013 for device 04:FE:A1:4B:0F:EA
Jul 27 11:14:40 avocet bluetoothd[915]: Unable to register GATT service with handle 0x0017 for device 04:FE:A1:4B:0F:EA
Jul 27 11:14:40 avocet bluetoothd[915]: Unable to register GATT service with handle 0x003d for device 04:FE:A1:4B:0F:EA
Jul 27 11:15:21 avocet sudo[3074]: pam_ecryptfs: pam_sm_authenticate: /home/mjd is already mounted
Jul 27 11:15:21 avocet sudo[3074]: mjd : TTY=pts/2 ; PWD=/home/mjd ; USER=root ; COMMAND=/usr/bin/pkill pulseaudio
Jul 27 11:15:21 avocet sudo[3074]: pam_unix(sudo:session): session opened for user root by mjd(uid=0)
Jul 27 11:15:21 avocet sudo[3074]: pam_unix(sudo:session): session closed for user root
Jul 27 11:15:21 avocet bluetoothd[915]: Endpoint unregistered: sender=:1.56 path=/MediaEndpoint/A2DPSource
Jul 27 11:15:21 avocet bluetoothd[915]: Endpoint unregistered: sender=:1.56 path=/MediaEndpoint/A2DPSink
Jul 27 11:15:21 avocet rtkit-daemon[1654]: Successfully made thread 3091 of process 3091 (n/a) owned by '1000' high priority at nice level -11.
Jul 27 11:15:21 avocet rtkit-daemon[1654]: Supervising 1 threads of 1 processes of 1 users.
Jul 27 11:15:21 avocet rtkit-daemon[1654]: Supervising 1 threads of 1 processes of 1 users.
Jul 27 11:15:21 avocet rtkit-daemon[1654]: Successfully made thread 3093 of process 3091 (n/a) owned by '1000' RT at priority 5.
Jul 27 11:15:21 avocet rtkit-daemon[1654]: Supervising 2 threads of 1 processes of 1 users.
Jul 27 11:15:21 avocet rtkit-daemon[1654]: Supervising 2 threads of 1 processes of 1 users.
Jul 27 11:15:21 avocet rtkit-daemon[1654]: Successfully made thread 3094 of process 3091 (n/a) owned by '1000' RT at priority 5.
Jul 27 11:15:21 avocet rtkit-daemon[1654]: Supervising 3 threads of 1 processes of 1 users.
Jul 27 11:15:21 avocet bluetoothd[915]: Endpoint registered: sender=:1.77 path=/MediaEndpoint/A2DPSource
Jul 27 11:15:21 avocet bluetoothd[915]: Endpoint registered: sender=:1.77 path=/MediaEndpoint/A2DPSink
Jul 27 11:15:21 avocet pulseaudio[3091]: [pulseaudio] backend-ofono.c: Failed to register as a handsfree audio agent with ofono: org.freedesktop.DBus.Error.ServiceUnknown: The name org.ofono was not provided by any .service files
Jul 27 11:15:21 avocet rtkit-daemon[1654]: Successfully made thread 3096 of process 3096 (n/a) owned by '1000' high priority at nice level -11.
Jul 27 11:15:21 avocet rtkit-daemon[1654]: Supervising 4 threads of 2 processes of 1 users.
Jul 27 11:15:21 avocet pulseaudio[3096]: [pulseaudio] pid.c: Daemon already running.
Jul 27 11:15:41 avocet bluetoothd[915]: Unable to register GATT service with handle 0x000a for device 04:FE:A1:4B:0F:EA
Jul 27 11:15:41 avocet bluetoothd[915]: Unable to register GATT service with handle 0x0013 for device 04:FE:A1:4B:0F:EA
Jul 27 11:15:41 avocet bluetoothd[915]: Unable to register GATT service with handle 0x0017 for device 04:FE:A1:4B:0F:EA
Jul 27 11:15:41 avocet bluetoothd[915]: Unable to register GATT service with handle 0x003d for device 04:FE:A1:4B:0F:EA
Jul 27 11:16:41 avocet kernel: input: 04:FE:A1:4B:0F:EA as /devices/virtual/input/input22
Jul 27 11:16:44 avocet rtkit-daemon[1654]: Supervising 3 threads of 1 processes of 1 users.
Jul 27 11:16:44 avocet rtkit-daemon[1654]: Successfully made thread 3145 of process 3091 (n/a) owned by '1000' RT at priority 5.
Jul 27 11:16:44 avocet rtkit-daemon[1654]: Supervising 4 threads of 1 processes of 1 users.
Jul 27 11:16:44 avocet kernel: Bluetooth: hci0 SCO packet for unknown connection handle 0
Jul 27 11:16:44 avocet kernel: Bluetooth: hci0 SCO packet for unknown connection handle 0
Jul 27 11:16:44 avocet kernel: Bluetooth: hci0 SCO packet for unknown connection handle 0
Jul 27 11:16:44 avocet kernel: Bluetooth: hci0 SCO packet for unknown connection handle 0
Jul 27 11:16:44 avocet kernel: Bluetooth: hci0 SCO packet for unknown connection handle 0
Jul 27 11:16:44 avocet kernel: Bluetooth: hci0 SCO packet for unknown connection handle 0
Jul 27 11:17:01 avocet CRON[3147]: pam_unix(cron:session): session opened for user root by (uid=0)
Jul 27 11:17:01 avocet CRON[3148]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Jul 27 11:17:01 avocet CRON[3147]: pam_unix(cron:session): session closed for user root
答案1
啊哈！其中pavuctl有一个按钮用于连接声源，例如mplayer连接到特定的输出设备：
这里说“内置音频模拟立体声”。但如果我点击它，就会弹出一个菜单：
选择“Fenchurch”使mplayerP2 输出。
我可以为 Spotify 做同样的事情。
我想下一步是了解如何让系统在 P2 可用时优先选择它。 这个问题似乎很相关。但现在我有足够的解决方案来继续我的一天。
答案2
您是否尝试通过取消声卡静音alsamixer？另外你可以分享一下systemctl status bluetooth和journalctl -n 50吗？