我在台式机上使用 Xubuntu 20.04，带有 USB 蓝牙适配器。直到几天前，一切都运行良好。现在，在启动系统时，蓝牙最初似乎可以工作，但它无法再连接到之前配对的设备。删除这些设备（为了重新配对 - 无意双关）显示它不会扫描新设备。调用会blueman-assistant产生崩溃报告 - 这是在终端中启动时的输出（即使在系统重新启动后）：
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/blueman/bluez/Base.py", line 81, in callback
value = proxy.call_finish(result).unpack()
gi.repository.GLib.Error: g-io-error-quark: GDBus.Error:org.bluez.Error.InProgress: Operation already in progress (36)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/blueman/bluez/Base.py", line 90, in callback
raise parse_dbus_error(e)
blueman.bluez.errors.DBusInProgressError: Operation already in progress
呼叫bluetoothctl power on成功...
[bluetooth]# power on
Changing power on succeeded
... 也list
[bluetooth]# list
Controller 00:15:83:3D:E0:55 joe [default]
似乎也scan on可以工作（除了找不到设备）
[bluetooth]# scan on
Discovery started
[CHG] Controller 00:15:83:3D:E0:55 Discovering: yes
系统没有硬件变化，只有常规的软件包更新，包括
linux-firmware
linux-generic
linux-headers-5.4.0-59
linux-headers-5.4.0-59-generic
linux-headers-5.4.0-60
linux-headers-5.4.0-60-generic
linux-headers-generic
linux-image-5.4.0-56-generic
linux-image-5.4.0-59-generic
linux-image-5.4.0-60-generic
linux-image-generic
linux-libc-dev:amd64
linux-modules-5.4.0-56-generic
linux-modules-5.4.0-59-generic
linux-modules-5.4.0-60-generic
linux-modules-extra-5.4.0-56-generic
linux-modules-extra-5.4.0-59-generic
linux-modules-extra-5.4.0-60-generic
我还能尝试什么来让它重新启动并运行？
编辑-附加信息：
dmesg | grep -i bluetooth带来以下信息：
[ 5.119166] Bluetooth: Core ver 2.22
[ 5.119180] Bluetooth: HCI device and connection manager initialized
[ 5.119182] Bluetooth: HCI socket layer initialized
[ 5.119184] Bluetooth: L2CAP socket layer initialized
[ 5.119185] Bluetooth: SCO socket layer initialized
[ 6.618854] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 6.618855] Bluetooth: BNEP filters: protocol multicast
[ 6.618858] Bluetooth: BNEP socket layer initialized
[ 14.340536] Bluetooth: RFCOMM TTY layer initialized
[ 14.340541] Bluetooth: RFCOMM socket layer initialized
[ 14.340546] Bluetooth: RFCOMM ver 1.11
[22012.620562] Bluetooth: hci0: urb 00000000bdcb6757 failed to resubmit (2)