"No bluetooth adaptors available" but BT is on and working

[Patrick O'Callaghan]

I tried to configure my BT mouse via the Plasma BT widget. It tells me
there are no adaptors, even though the mouse is working, the BT
dongle's light is on, the kernel modules are loaded:

    $ sudo lsmod|grep -i blue
    bluetooth             483328  28 bnep,hidp,btbcm,btrtl,btusb,rfcomm,btintel
    rfkill                 24576  4 bluetooth

and systemd shows BT as running:

    $ systemctl |grep -i blue
   
sys-devices-pci0000:00-0000:00:1a.0-usb3-3\x2d1-3\x2d1.2-3\x2d1.2.1-3\x2d1.2.1:1.0-bluetooth-hci0-rfkill2.device
loaded active plugged   ANYCOM_Bluetooth_USB-250_UHE
   
sys-devices-pci0000:00-0000:00:1a.0-usb3-3\x2d1-3\x2d1.2-3\x2d1.2.1-3\x2d1.2.1:1.0-bluetooth-hci0.device         loaded
active plugged   ANYCOM_Bluetooth_USB-250_UHE
   
sys-subsystem-bluetooth-devices-hci0.device                                                                      loaded
active plugged   ANYCOM_Bluetooth_USB-250_UHE
   
sys-subsystem-rfkill-devices-rfkill2.device                                                                      loaded
active plugged   ANYCOM_Bluetooth_USB-250_UHE
   
bluetooth.service                                                                                                loaded
active running   Bluetooth service
   
bluetooth.target                                                                                                 loaded
active active    Bluetooth

This is with the latest updates to kf5 etc. as of this morning.

poc