Hey, it's due to my recent keyboard purchase! wtf? I 've disconnected it and it boots straight into Ambient as usual. It's connected directly on onboard usb port. I switched it to another 1.1 onboard port and got same behavior. However this is a cooler master mk110/ms110, I don't understand what it has to do with the OF (doesn't have any eject button or the likes, it's pretty basic kboard ffs!).

If I connect on a nec pci usb 2.0, will MorphOS face any difficulty to handle it as keyboard?

Will do more tests. Damn it and it works great on MorphOS! Such a dissapointment :/