@jock do you think this is the same on RK3566 chips? I have an Orange pi 3B that works with normal resolution (1080p, 720p 768) but with 1024x600 there is no screen output.
If yes, how would i go about testing it? I see your rockchip64-video-le-patches branch does not have opi3b as it was added later to armbian.
Thanks