Knobster Disconnected in Air Player

[Knaldgas]

Have installed Air Player on an RPi4 and set it to auto-start.
Air Manager on Windows 11 connects nicely to AP on RPi4, but the Knobster on RPi4 shows disconnected.
Restarting AM and/or AP does not help.
Unplug then plug the knobster USB resolves the issue.

I would like the system to "just start up" without having to reconnect the knobster on every start. How can I do that?
I tried a couple of ways to reconnect the device from command line: https://askubuntu.com/questions/645/how ... mmand-line
I tried the c-program:

Code: Select all

/* usbreset -- send a USB port reset to a USB device */
...

and the

Code: Select all

sudo sh -c "echo 0 > /sys/bus/usb/devices/1-4.6/authorized"
sudo sh -c "echo 1 > /sys/bus/usb/devices/1-4.6/authorized"

but didn't work (intention were to do some kind of work-around)

How can I fix this?