Just tried a fresh install of Nexus on a RockPro64 and got a black screen. Decided to try the upgrade route instead from 10.04 to 11.0 and had much better results. Upgrade went fine BUT the black screen returns when doing system restart. If I power down the unit and start from cold LE is booting fine. I have to say this is a new one on me. I’ve ruled out the possibility of cable issues too.