Originally Posted by giorgio130
The thing is the kindle cannot boot into diags any more... whatever is the reason! I really remember having seen those uboots that saved the bootmode... maybe I'm just wrong
Try re-flashing the 5.0.0 diags kernel + 5.0.1 diags+ssh partition. I don't see a reason why it shouldn't boot into diags (except for a broken kernel or so).
PS: If you're talking about the 5.1.2 main image, it's from a Wifi-only Kindle - but the FW is identical anyway. Maybe the demo Kindles report a different (wrong) ID "somewhere" (TM).