Linux known Joystick not seen by MAVProxy module joystick or findjoy

(Working on Linux Mint Ulyana that’s based on Ubuntu Focal)

Using my Taranis QX7 via USB as Joystick is working as it should. The only thing I had to do is to prepare a Taranis.yml with the correct match: in /home/willy/.mavproxy/joysticks

When I try to use my Orange USB Dongle, it’s been recognized by Linux, but not by the joystick module or the findjoy tool in MAVProxy.

Taranis QX7 via USB-Kabel

$> cat /proc/bus/input/devices
I: Bus=0003 Vendor=0483 Product=5710 Version=0111
N: Name=“FrSky FrSky Taranis Joystick”
P: Phys=usb-0000:00:14.0-3/input0
S: Sysfs=/devices/pci0000:00/0000:00:14.0/usb3/3-3/3-3:1.0/0003:0483:5710.0005/input/input21
U: Uniq=00000000001B
H: Handlers=event17 js0
B: EV=1b
B: KEY=ff 0 0 0 0 0 0 ffff000000000000 0 0 0 0
B: ABS=7f
B: MSC=10

Orange-Empfänger FrSky D8 am USB

$> cat /proc/bus/input/devices
I: Bus=0003 Vendor=0451 Product=16a5 Version=0111
N: Name=“OrangeRX FrSky USB HID”
P: Phys=usb-0000:00:14.0-3/input0
S: Sysfs=/devices/pci0000:00/0000:00:14.0/usb3/3-3/3-3:1.0/0003:0451:16A5.0004/input/input20
U: Uniq=
H: Handlers=event17 js0
B: EV=9
B: ABS=ff

$> jstest /dev/input/js0
Driver version is 2.1.0.
Joystick (OrangeRX FrSky USB HID) has 8 axes (X, Y, Z, Rx, Ry, Rz, Throttle, Rudder)
and 0 buttons ().
Testing … (interrupt to exit)
Axes: 0: 5405 1: 0 2: 0 3: 0 4: 0 5: 32767 6: 32767 7:-32767
-----> the axes are moving correctly in Linux

$> python -m MAVProxy.modules.mavproxy_joystick.findjoy
pygame 2.1.2 (SDL 2.0.16, Python 3.8.10)
Hello from the pygame community. Contribute - pygame wiki
This script will help you identify axis, button, hat, and
ball ids on your joystick in order to create new joystick
definitions for the mavproxy_joystick module.

Available joysticks:

Select a joystick (L to list, Q to quit)
-----> no joystick found in MAVProxy

I’ve got stuck here - could anybody give me a hint how to proceed?