Failed to connect over Serial (Arch Linux)

[zorglub76]

I'm trying to connect to the Teensy from Arch Linux (OrangePi CM4 board).
When I list usb devices, I'm able to find the device:

Bus 002 Device 002: ID 16c0:048a Van Ooijen Technische Informatica M8
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Chromium asked me if I'd allow to connect to Teensy, and I confirmed that.
There's no dialout group here, and the equivalent group should be uucp. I added my user to that group, but still nothing.
Btw. the same happend when I tried to connect from RPi 4 with their default OS.

Any ideas what might have went wrong?

[zorglub76]

Aaaagh.... I had to log out/in after I added a user into the group!
Stupid of me.
But anyways, you can update the readme with info about Arch - the group to use is definitively uucp