I do not have any other monitor available but I did order a UART to usb device, and I have identified with a multimeter the uart pads, which are next to the SD card slot. I will keep this feed updated!

Hello! You should really look to the board name in rk3318-config rather than relying to led-conf numbering; also your dmesg is showing a very bad error which is probably due to an unstable system rather than a bug

rk322x armbian images never used the offset of 8192 sectors, only the multitool has such offset to increase compatibility with stock images

@Hqnicolas would it be possible to have the driver @guenter pointed out in the base image?

I think the core problem is that headers were compiled with Ubuntu compiler / userspace and you try to use it on Debian. I used this on Ubuntu, which is the reason why it worked. We are aware of this problem - headers should be distro specific. Which adds complexity on our side ...