Florin

Hi, thanks for the reply!
I was using images from here, since tx5pro is not an officially supported device:

I managed to get it working in the end. The issue is that i was following outdated video tutorials for this, and the new instructions changed.  To be more concrete, i was copying the device tree to the root of the sd card and renaming it, instead of changing the env file to contain the path to the proper device tree file. So i was booting with the wrong dtb file each time
 
if anyone gets stuck on this, i followed this:
https://www.ondroid.net/armbian-os-uenv-ini-and-extlinux-conf/
the folder structure is not 100% the same (dtb files are in dtb/amlogic, not in the 'dtb' folder) but similar enough.