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

#1

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)

#2

Check if the type c alt mode of your hub works with Radxa OS first:

https://github.com/radxa-build/rock-5b-plus/releases/download/rsdk-b2/rock-5b-plus_bookworm_kde_b2.output.img.xz

#3

But even I use another monitor with direct USB-C (the monitor has built-in ALT mode) it wasn’t working.
Or it needs OS to support? I was using image from Armbian.