USB-C DP ALT mode not working on Rock 5B+

Hi all,

First time user here, just bought Rock 5B+ 32GB and using Armbian (Noble KDE Neon) build, it runs fine but I found that the USB-C video out isn’t working (the USB-C to DP dongle connected to 4K monitor showing no signal, but it works when I plug other laptops on the monitor can display).

Do I need to do something extra to enable that?

Also, can the board getting power from the same port? (I have another monitor with 60W PD output) Then I can use a single USB-C cable to hook up everything (monitor also has USB hub built-in)