I made a typing error: Please use the the correct emmc block instead the parition: Extract the DTB file with: dd if=/dev/mmcblk1 of=rk3528-<TV_BOX_NAME>.dtb skip=<START_ADDR> count=<SIZE> bs=1

So I rebuilt the image, applied a patch to integrate the tpm into the dts during the build and it works. I still need to figure out how to make overlays work with GRUB in case we need them. Thank you for your support

Since you're using UEFI, you can use Grub to boot. Grub has a Devcetree command. There's also a post here on how to integrate overlays:

Hello, Thank you for your answers. I decided to recompile the whole image with the correct configuration to be sure I did not mess up anything when updating my kernel (following this https://github.com/armbian/build/commit/54c896e0298a441338cd7d29f312ca590304f120 , using BRANCH=vendor RELEASE=noble) I was able to get the boot logs (see attached file). It seems since I'm using UEFI it completely bypasses the U-Boot applying the overlays ( i can see EFI stub: Using DTB from configuration table inside the logs but no Applying device tree overlay...) . I'll try to recompile the image while integrating my overlay directly into it to see if it works. boot.logs

You are likely hitting genuine bugs and/or the situation of missing packages. I do not use Cinnamon, so I cannot comment much. Try to see if there is anything relevant in the logs. Check ~/.xsession* files for hints, too. Maybe try a different DE first, set up it to be working and then work on your preferred choice after that. Have a look at APA which is trying to improve the experience of Armbian as an OS, maybe it can help you. Good luck, amigo!