Kurt

And looking at the overlay source (dtc -O dts) , the hdmi1-8k and hdmi2-8k can not both be effective at the same time. They also seem to nullify the opp-oc-24ghz overlay. If I remove them again, the HDMI output still works. Puzzling. So I don't know if they actually have a made a difference (and only needed to be used once?) or whether the change and the start of HDMI working was a coincidence.

I booted my OPi5B from SD card with Armbian dd'ed to it and with the 5b DTB enabled. I logged in via ssh and ran armbian-config as root. System - Hardware I enabled rock-5b-hdmi1-8k and rock-5b-hdmi2-8k overlays. I rebooted and HDMI output started working. So `armbianEnv.txt` reads now: ``` verbosity=1 bootlogo=true overlay_prefix=rockchip-rk3588 fdtfile=rockchip/rk3588s-orangepi-5b.dtb rootdev=UUID=329a3cf7-a8ce-4ea6-a3ef-c2128bda1678 rootfstype=ext4 overlays=opp-oc-24ghz rock-5b-hdmi1-8k rock-5b-hdmi2-8k usbstoragequirks=0x2537:0x1066:u,0x2537:0x1068:u ``` HTH!