tried several armbian images with kernel 5.15.76, no success!
even tried to disable SPI flash, although radxa says "no SPI Flash on the board" in contrast to the 4B version
official 4.4 radxa image is booting: rockpi-4b-debian-bullseye-xfce4-arm64-20221109-1447-gpt.img

can someone send me armbian bullseye image with older kernel?

Actually armbian does boot! 😏
The HDMI output is just broken, ssh no problem.
Thats fine for the moment, maybe I will try to fix that later.

off topic: Mirror provided by Werner only have kernel 5.15.76 for Rock 4B
The armbian website always redirected me there (because I'm German?), I just found other mirrors with greater variety of images by pure luck 🙃

1 hour ago, tyrosin said:

off topic: Mirror provided by Werner only have kernel 5.15.76 for Rock 4B

 

Impossible. Perhaps you stumbled to archive mirrors which contains all old images? Here you can observe which mirrors we have and how they are organised:
https://github.com/armbian/mirror

 

1 hour ago, tyrosin said:

because I'm German?

No, because this is best mirror for your location.

ahhh yess, i was a little bit confused 🙃
now I understand it better. thx!