Arduino IDE - /dev/ttyACM0 Permission denied

Last check for today. I added myself to uucp group as the 1st step, even before the first attempt. installing arduino-avr-core didn’t change a thing. the same with java (ver 14 installed previously). Manjaro is fresh out of the box, just starting migration.
As I can see you have a different board. Yours appears as ttyUSB. I have ProMicro (leonardo) and it appears as ttyACM. I think there is the same issue as with uno and mega sth (cannot remember the exact model). The board as direct usb not as virtual com port.
I believe it is a write permit issue. read (monitor mode) is ok under root and normal user, write is working only as root and normal user got permission denied.

Will be very grateful for help with troubleshooting this. It is a small but annoying thing, not the extra step starting the arduino ide as root but because it doesn’t work as I want it to :slight_smile: .