Did you try different ports? (I think you did, just asking).
Of course; I'm aware sometimes the port may be a little faulty. But no difference -- the keyboard always acts as if it wasn't connected.
No, I always use ISO image; in fact no idea what can I do with that "raw" file.
Does you keyboard have a hub? (USB ports on the keyboard itself)
No, it doesn't -- and in fact it was cooperating with Kolibri, but on the different motherboard.
Could you please open the BOARD app /sys/develop/board => save log /tmp0/1/boardlog.txt => attach it here.
Yes, but if you could tell me, how. At the moment keyboard and mice cannot be "seen" by Kolibri. Cannot type anything as soon as graphic mode is started. But if there's possibility to "telnet" and operate Kolibri remotely, then there's a chance.