>> The Problem was very easy to fix: I just attached a mouse to the system.
>> Oh man... Why can't NetBSD just say: "No mouse attached - I'm going to
>> hang now" :-).
>
> This problem also occurs on my 5000/125.
>       [ ... snip ... ]
> I'm not sure what is the right fix. though.

To put a user notice telling "mouse is required when the system boots
in video console mode, or the system would hang during boot process."

It's practically acceptable just to abandon mouse hardware
initialization during kernel boot, I think. 

Tohru Nishimura