我不知道该把这个发到哪里（Android 论坛？KDE 论坛？）。我研究这个问题好几个小时了，却没有找到任何解决办法。
我有一台全新的极米投影仪，上面有 Android TV。音质很好，所以我想通过蓝牙将它用作各种设备的音频。
它可以在任意 Android 手机或平板电脑上完美运行。
但是从 3 台不同的 Kubuntu PC（1yo、11yo 和 3yo，全部更新到 23.10）上，音频在 30 秒后断开（但蓝牙保持连接）。同样的 PC 在连接到我测试过的各种蓝牙耳机时都存在问题。
因此问题完全出在 KDE/Linux 和 Android TV 之间。当通过蓝牙播放音乐时，投影仪会启动一个名为 XMusic 播放器的应用程序 (?)。30 秒后，配置文件从 PulseAudio 音量控制中消失，而蓝牙连接仍然存在（两端均存在）。
input: gjs projo (AVRCP) as /devices/virtual/input/input58除了连接之外，dmesg 没有显示任何内容。
/var/log/syslog有以下内容（简化）：
# Bluetooth connection established
bluetoothd[1276]: src/service.c:btd_service_connect() a2dp-source profile connect failed for DC:97:58:78:6D:54: Device or resource busy
bluetoothd[1276]: /org/bluez/hci0/dev_DC_97_58_78_6D_54/sep2/fd5: fd(42) ready
kernel: [3348060.664812] input: gjs projo (AVRCP) as /devices/virtual/input/input51
# Start playing music manually over BT
wireplumber[3749]: 0x5591ad87f678: error 24
wireplumber[3749]: (bluez_output.DC_97_58_78_6D_54.1-87) running -> error (Received error event)
wireplumber[3749]: Failure in Bluetooth audio transport /org/bluez/hci0/dev_DC_97_58_78_6D_54/sep2/fd5
pipewire[3746]: pw.node: (bluez_output.DC_97_58_78_6D_54.1-87) running -> error (Received error event)
org.kde.kdeconnect[4434]: org.kde.pulseaudio: No object for name "bluez_output.DC_97_58_78_6D_54.1"
plasmashell[4125]: org.kde.plasma.pulseaudio: No object for name "bluez_output.DC_97_58_78_6D_54.1"
pipewire[3746]: spa.audioadapter: 0x55fcd52e3da8: scheduling stopped node
# Music fails over BT after 30s
plasmashell[4125]: QQmlExpression: Expression file:///usr/share/plasma/plasmoids/org.kde.plasma.private.systemtray/contents/ui/ExpandedRepresentation.qml:181:21 depends on non-NOTIFYable properties:
plasmashell[4125]: QAction::priority
plasmashell[4125]: message repeated 2 times: [ QAction::priority]
plasmashell[4125]: QQmlExpression: Expression file:///usr/share/plasma/plasmoids/org.kde.plasma.private.systemtray/contents/ui/ExpandedRepresentation.qml:82:17 depends on non-NOTIFYable properties:
plasmashell[4125]: QAction::priority
plasmashell[4125]: message repeated 2 times: [ QAction::priority]
kwin_x11[4061]: kwin_core: XCB error: 152 (BadDamage), sequence: 1490, resource id: 30723735, major code: 143 (DAMAGE), minor code: 3 (Subtract)
# Manual BT disconnect (no messages)
连接时：
$ inxi -Alsa -j
Audio:
Device-1: Intel Tiger Lake-LP Smart Sound Audio vendor: Dell
driver: snd_hda_intel v: kernel alternate: snd_sof_pci_intel_tgl
bus-ID: 00:1f.3 chip-ID: 8086:a0c8 class-ID: 0403
API: ALSA v: k6.5.0-17-generic status: kernel-api
tools: alsactl,alsamixer,amixer
Server-1: PipeWire v: 0.3.79 status: active with: 1: pipewire-pulse
status: active 2: wireplumber status: active tools: pw-cat,pw-cli,wpctl
Server-2: PulseAudio v: 16.1 status: off (using pipewire-pulse)
tools: pacat,pactl,pavucontrol
Swap:
Kernel: swappiness: 60 (default) cache-pressure: 100 (default) zswap: no
ID-1: swap-1 type: partition size: 15.95 GiB used: 8.39 GiB (52.6%)
priority: -2 dev: /dev/dm-2 maj-min: 252:2 mapped: vgkubuntu-swap_1
label: N/A
Sensors:
Src: /sys System Temperatures: cpu: 46.0 C mobo: N/A
Fan Speeds (rpm): N/A
Power: 12v: N/A 5v: 5 3.3v: N/A vbat: N/A
$ systemctl --user status pipewire pipewire-pulse wireplumber | cat
● pipewire.service - PipeWire Multimedia Service
Loaded: loaded (/usr/lib/systemd/user/pipewire.service; enabled; preset: enabled)
Active: active (running) since Sun 2024-02-18 15:25:45 CET; 1 month 8 days ago
TriggeredBy: ● pipewire.socket
Main PID: 3746 (pipewire)
Tasks: 3 (limit: 18723)
Memory: 16.1M
CPU: 38min 56.709s
CGroup: /user.slice/user-10705.slice/[email protected]/session.slice/pipewire.service
└─3746 /usr/bin/pipewire
Mar 25 10:11:26 lpsc0175x pipewire[3746]: spa.audioadapter: 0x55fcd52e3da8: scheduling stopped node
Mar 25 16:26:14 lpsc0175x pipewire[3746]: spa.audioadapter: 0x55fcd52e3da8: scheduling stopped node
Mar 27 15:46:39 lpsc0175x pipewire[3746]: spa.audioadapter: 0x55fcd52e3da8: scheduling stopped node
Mar 28 09:21:17 lpsc0175x pipewire[3746]: pw.node: (bluez_output.DC_97_58_78_6D_54.1-70) running -> error (Received error event)
Mar 28 09:22:22 lpsc0175x pipewire[3746]: pw.node: (bluez_output.DC_97_58_78_6D_54.1-41) running -> error (Received error event)
Mar 28 09:25:53 lpsc0175x pipewire[3746]: pw.node: (bluez_output.DC_97_58_78_6D_54.1-87) running -> error (Received error event)
Mar 28 09:25:53 lpsc0175x pipewire[3746]: spa.audioadapter: 0x55fcd52e3da8: scheduling stopped node
Mar 28 09:35:32 lpsc0175x pipewire[3746]: pw.node: (bluez_output.DC_97_58_78_6D_54.1-41) running -> error (Received error event)
Mar 28 10:05:29 lpsc0175x pipewire[3746]: pw.node: (bluez_output.DC_97_58_78_6D_54.1-67) running -> error (Received error event)
Mar 28 10:06:27 lpsc0175x pipewire[3746]: pw.node: (bluez_output.DC_97_58_78_6D_54.1-73) running -> error (Received error event)
● pipewire-pulse.service - PipeWire PulseAudio
Loaded: loaded (/usr/lib/systemd/user/pipewire-pulse.service; enabled; preset: enabled)
Active: active (running) since Sun 2024-02-18 15:25:45 CET; 1 month 8 days ago
TriggeredBy: ● pipewire-pulse.socket
Main PID: 3755 (pipewire-pulse)
Tasks: 3 (limit: 18723)
Memory: 38.9M
CPU: 33min 6.067s
CGroup: /user.slice/user-10705.slice/[email protected]/session.slice/pipewire-pulse.service
└─3755 /usr/bin/pipewire-pulse
Feb 18 15:25:45 lpsc0175x systemd[3736]: Started pipewire-pulse.service - PipeWire PulseAudio.
Mar 28 10:31:51 lpsc0175x pipewire-pulse[3755]: mod.protocol-pulse: client 0x55ede1df7aa0 [PulseAudio Volume Control]: ERROR command:104 (SEND_OBJECT_MESSAGE) tag:38 error:3 (Invalid argument)
Mar 28 10:31:51 lpsc0175x pipewire-pulse[3755]: mod.protocol-pulse: client 0x55ede1df7aa0 [PulseAudio Volume Control]: ERROR command:104 (SEND_OBJECT_MESSAGE) tag:39 error:3 (Invalid argument)
● wireplumber.service - Multimedia Service Session Manager
Loaded: loaded (/usr/lib/systemd/user/wireplumber.service; enabled; preset: enabled)
Active: active (running) since Sun 2024-02-18 15:25:45 CET; 1 month 8 days ago
Main PID: 3749 (wireplumber)
Tasks: 6 (limit: 18723)
Memory: 9.9M
CPU: 38.459s
CGroup: /user.slice/user-10705.slice/[email protected]/session.slice/wireplumber.service
└─3749 /usr/bin/wireplumber
Mar 28 09:35:32 lpsc0175x wireplumber[3749]: (bluez_output.DC_97_58_78_6D_54.1-41) running -> error (Received error event)
Mar 28 09:35:32 lpsc0175x wireplumber[3749]: Failure in Bluetooth audio transport /org/bluez/hci0/dev_DC_97_58_78_6D_54/sep2/fd7
Mar 28 09:48:36 lpsc0175x wireplumber[3749]: 0x5591ad87f678: error 24
Mar 28 09:48:36 lpsc0175x wireplumber[3749]: Failed to release transport /org/bluez/hci0/dev_FC_58_FA_C6_BB_3B/sep1/fd8: Method "Release" with signature "" on interface "org.bluez.MediaTransport1" doesn't exist
Mar 28 10:05:29 lpsc0175x wireplumber[3749]: 0x5591ad87f678: error 24
Mar 28 10:05:29 lpsc0175x wireplumber[3749]: (bluez_output.DC_97_58_78_6D_54.1-67) running -> error (Received error event)
Mar 28 10:05:29 lpsc0175x wireplumber[3749]: Failure in Bluetooth audio transport /org/bluez/hci0/dev_DC_97_58_78_6D_54/sep2/fd10
Mar 28 10:06:27 lpsc0175x wireplumber[3749]: 0x5591ad87f678: error 24
Mar 28 10:06:27 lpsc0175x wireplumber[3749]: (bluez_output.DC_97_58_78_6D_54.1-73) running -> error (Received error event)
Mar 28 10:06:27 lpsc0175x wireplumber[3749]: Failure in Bluetooth audio transport /org/bluez/hci0/dev_DC_97_58_78_6D_54/sep2/fd11
我删除了~/.local/state/wireplumber，没有变化。在一台电脑上，我已将 设置session.suspend-timeout-seconds为 0 /etc/wireplumber/main.lua.d/50-alsa-config.lua，但另一台电脑没有目录/etc/wireplumber。
我不知道我还能做什么。