bluetooth rock64 problem

[deta]

hello,

I had to set up my Rock64 a few days ago because the SD card had unfortunately died.
As always, I first installed a new SD card with the image "Armbian_20.02.1_Rock64_buster_current_5.4.20". Everything great. Only my bluetooth stick does not want to run.


I don't have a desktop version, only access via SSH


The stick is recognized, as before. Here are a few system information:

Code:

root@rock64:~# lsusb
Bus 005 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 002: ID 0451:16a8 Texas Instruments, Inc.
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
root@rock64:~#
root@rock64:~# dmesg | grep -i bluetooth
[34669.643396] Bluetooth: Core ver 2.22
[34669.643482] Bluetooth: HCI device and connection manager initialized
[34669.643498] Bluetooth: HCI socket layer initialized
[34669.643506] Bluetooth: L2CAP socket layer initialized
[34669.643522] Bluetooth: SCO socket layer initialized
root@rock64:~#
root@rock64:~# hcitool scan
Device is not available: No such device
root@rock64:~#
root@rock64:~# hcitool dev
Devices:
root@rock64:~#

Why is the stick not recognized with hcitool?
What else can I do?
What is missing ?

cu Deta