我正在运行 20.04.3 LTS。当我启动我的机器时，蓝牙管理器按预期启动，我可以连接到蓝牙设备。在我的电源设置中，我启用了“可以关闭蓝牙以节省电量”。
如果我让计算机处于挂起状态，蓝牙管理器就会消失，我无法重新启动它，也无法再连接任何蓝牙设备。我怎样才能强制它重新启动而不必重新启动我的计算机？（或者首先防止出现问题？）
正常状态
在出现任何问题之前，的输出/etc/init.d/bluetooth status如下：
● bluetooth.service - Bluetooth service
Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
Active: active (running) since Tue 2022-02-15 11:20:46 GMT; 1h 18min ago
Docs: man:bluetoothd(8)
Main PID: 1857 (bluetoothd)
Status: "Running"
Tasks: 1 (limit: 18495)
Memory: 2.2M
CGroup: /system.slice/bluetooth.service
└─1857 /usr/lib/bluetooth/bluetoothd
Feb 15 11:20:46 lenovo bluetoothd[1857]: audio-avrcp-target: Protocol not supported (93)
Feb 15 11:20:47 lenovo bluetoothd[1857]: Endpoint registered: sender=:1.42 path=/MediaEndpoint/A2DPSink/sbc
Feb 15 11:20:47 lenovo bluetoothd[1857]: Endpoint registered: sender=:1.42 path=/MediaEndpoint/A2DPSource/sbc
Feb 15 11:20:50 lenovo bluetoothd[1857]: L2CAP server failed for Message Notification: setsockopt(L2CAP_OPTIONS): Invalid argument (22)
Feb 15 11:20:50 lenovo bluetoothd[1857]: L2CAP server failed for Message Access: setsockopt(L2CAP_OPTIONS): Invalid argument (22)
Feb 15 11:20:50 lenovo bluetoothd[1857]: L2CAP server failed for Phone Book Access: setsockopt(L2CAP_OPTIONS): Invalid argument (22)
Feb 15 11:20:50 lenovo bluetoothd[1857]: L2CAP server failed for File Transfer: setsockopt(L2CAP_OPTIONS): Invalid argument (22)
Feb 15 11:20:50 lenovo bluetoothd[1857]: L2CAP server failed for Object Push: setsockopt(L2CAP_OPTIONS): Invalid argument (22)
Feb 15 11:21:22 lenovo bluetoothd[1857]: avrcp-controller profile connect failed for 00:08:8A:FF:53:3D: Input/output error
Feb 15 11:21:22 lenovo bluetoothd[1857]: /org/bluez/hci0/dev_00_08_8A_FF_53_3D/sep1/fd0: fd(38) ready
正常状态Ⅱ
$ systemctl list-unit-files | grep blue
blueman-mechanism.service disabled enabled
bluetooth.service enabled enabled
dbus-org.bluez.service enabled enabled
bluetooth.target static enabled
我尝试过
重启服务
从从睡眠状态恢复后蓝牙不工作，Ubuntu 18.04 LTS
modprobe -r btusb
sleep 1
service bluetooth restart
sleep 1
modprobe btusb
结果：没有变化。
检查设备状态
仍处于活跃和运行状态 (!?)
$ /etc/init.d/bluetooth status
● bluetooth.service - Bluetooth service
Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
Active: active (running) since Thu 2022-02-17 09:30:24 GMT; 7h ago
Docs: man:bluetoothd(8)
Main PID: 1859 (bluetoothd)
Status: "Running"
Tasks: 1 (limit: 18495)
Memory: 2.9M
CGroup: /system.slice/bluetooth.service
└─1859 /usr/lib/bluetooth/bluetoothd
Feb 17 14:12:48 lenovo bluetoothd[1859]: Unable to get io data for Headset Voice gateway: getpeername: Transport endpoint is not connected (107)
Feb 17 14:13:33 lenovo bluetoothd[1859]: avrcp-controller profile connect failed for 00:08:8A:FF:53:3D: Input/output error
Feb 17 14:13:33 lenovo bluetoothd[1859]: /org/bluez/hci0/dev_00_08_8A_FF_53_3D/sep1/fd2: fd(37) ready
Feb 17 15:46:05 lenovo bluetoothd[1859]: No reply to Start request
Feb 17 15:46:05 lenovo bluetoothd[1859]: Unable to get io data for Headset Voice gateway: getpeername: Transport endpoint is not connected (107)
Feb 17 15:46:05 lenovo bluetoothd[1859]: avrcp-controller profile connect failed for 00:08:8A:FF:53:3D: Input/output error
Feb 17 15:46:05 lenovo bluetoothd[1859]: /org/bluez/hci0/dev_00_08_8A_FF_53_3D/sep1/fd3: fd(37) ready
Feb 17 16:16:46 lenovo bluetoothd[1859]: Unable to get io data for Headset Voice gateway: getpeername: Transport endpoint is not connected (107)
Feb 17 16:16:46 lenovo bluetoothd[1859]: Endpoint unregistered: sender=:1.41 path=/MediaEndpoint/A2DPSink/sbc
Feb 17 16:16:46 lenovo bluetoothd[1859]: Endpoint unregistered: sender=:1.41 path=/MediaEndpoint/A2DPSource/sbc
检查设备状态二
$ lsusb; dmesg | egrep -i 'blue|firm'
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 002: ID 04ca:7070 Lite-On Technology Corp. Integrated Camera
Bus 003 Device 004: ID 27c6:55a4 Shenzhen Goodix Technology Co.,Ltd. Goodix FingerPrint Device
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
[ 6.728422] i915 0000:00:02.0: [drm] Finished loading DMC firmware i915/icl_dmc_ver1_09.bin (v1.9)
[ 131.924258] iwlwifi 0000:00:14.3: loaded firmware version 63.c04f3485.0 Qu-c0-hr-b0-63.ucode op_mode iwlmvm
[ 132.022131] Bluetooth: Core ver 2.22
[ 132.022154] Bluetooth: HCI device and connection manager initialized
[ 132.022159] Bluetooth: HCI socket layer initialized
[ 132.022162] Bluetooth: L2CAP socket layer initialized
[ 132.022166] Bluetooth: SCO socket layer initialized
[ 132.147943] Bluetooth: hci0: Bootloader revision 0.4 build 0 week 11 2017
[ 132.148943] Bluetooth: hci0: Device revision is 2
[ 132.148945] Bluetooth: hci0: Secure boot is enabled
[ 132.148946] Bluetooth: hci0: OTP lock is enabled
[ 132.148947] Bluetooth: hci0: API lock is enabled
[ 132.148947] Bluetooth: hci0: Debug lock is disabled
[ 132.148947] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[ 132.152089] Bluetooth: hci0: Found device firmware: intel/ibt-19-32-4.sfi
[ 133.715425] Bluetooth: hci0: Waiting for firmware download to complete
[ 133.715942] Bluetooth: hci0: Firmware loaded in 1527196 usecs
[ 133.716026] Bluetooth: hci0: Waiting for device to boot
[ 133.731078] Bluetooth: hci0: Device booted in 14720 usecs
[ 133.731693] Bluetooth: hci0: Found Intel DDC parameters: intel/ibt-19-32-4.ddc
[ 133.734061] Bluetooth: hci0: Applying Intel DDC parameters completed
[ 133.736995] Bluetooth: hci0: Firmware revision 0.0 build 121 week 36 2020
[ 133.796965] Bluetooth: hci0: MSFT filter_enable is already on
[ 135.656768] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 135.656771] Bluetooth: BNEP filters: protocol multicast
[ 135.656778] Bluetooth: BNEP socket layer initialized
[ 136.784480] Bluetooth: RFCOMM TTY layer initialized
[ 136.784487] Bluetooth: RFCOMM socket layer initialized
[ 136.784491] Bluetooth: RFCOMM ver 1.11
[ 151.284331] audit: type=1107 audit(1645090240.283:147): pid=1864 uid=103 auid=4294967295 ses=4294967295 subj=unconfined msg='apparmor="DENIED" operation="dbus_method_call" bus="system" path="/" interface="org.freedesktop.DBus.ObjectManager" member="GetManagedObjects" mask="send" name="org.bluez" pid=3385 label="snap.bitwarden.bitwarden" peer_pid=1859 peer_label="unconfined"
[ 1612.134048] audit: type=1107 audit(1645091700.798:179): pid=1864 uid=103 auid=4294967295 ses=4294967295 subj=unconfined msg='apparmor="DENIED" operation="dbus_method_call" bus="system" path="/" interface="org.freedesktop.DBus.ObjectManager" member="GetManagedObjects" mask="send" name="org.bluez" pid=15716 label="snap.bitwarden.bitwarden" peer_pid=1859 peer_label="unconfined"
检查设备状态三
$ systemctl list-unit-files | grep blue
blueman-mechanism.service enabled enabled
bluetooth.service enabled enabled
dbus-org.bluez.service enabled enabled
bluetooth.target static enabled
从https://stackoverflow.com/a/68335639/236081
这可能表示多个冲突的服务正在抑制蓝牙。（仍在调查。请注意，blueman-mechanism.service正常状态下处于禁用状态。）
从命令行启动 blueman-manager
$ blueman-manager
blueman-manager version 2.1.2 starting
blueman-manager 12.42.28 ERROR Manager:118 on_dbus_name_appeared: Default adapter not found, trying first available.
blueman-manager 12.42.28 ERROR Manager:122 on_dbus_name_appeared: No adapter(s) found, exiting
结果：启动失败。未找到适配器。
关闭并重新打开
在电源设置中，我尝试关闭“蓝牙可以关闭”设置，然后重新打开。
按下键盘上的“飞行模式”按钮，将其关闭然后重新打开。
结果：在每种情况下，蓝牙管理器指示器都会弹出然后消失。