After having troubles with an update I switched back to the manufacturer's build for Ubuntu Server. Yes, outdated but with newer kernel than the "stable" armbian release.
But I saw also that I didn't answer exactly on the first message and noticed the remarks on the armbian page for the opiz2 that newer "supported versions" doesn't include HDMI. That I haven't tested because I connected via terminal and this worked. Until my recent update try.
I will gladly return to an armbian linux if this distribution has an actual maintainer and not only automated builds.
