On 10 March 2017 at 14:23, H. Nikolaus Schaller <hns@goldelico.com> wrote:
The only questionable part is "Output Unknown16-1 has no monitor section".

That sounds like the problem. Try adding

Option "Monitor-Unknown16-1" "lcd"
Option "Monitor-DSI-1" "lcd"

to your Device section. The second line is for when someone notices connector type 16 is defined in the kernel and fixes X11 to recognize it :P

Matthijs