In message <41D679A0.5040102@augustsson.net>, Lennart Augustsson writes:
>Steven M. Bellovin wrote:
>> On a 2.0 laptop, the system won't boot properly with a USB keyboard 
>> connected.
>> 
>> To be precise, the machine is a Thinkpad R51; the keyboard is a compact 
>> IBM PS/2 keyboard, hooked to the machine via a Belkin PS/2-to-USB 
>> adapter.  (R51s have no integral PS/2 ports.)  The keyboard is 
>> recognized as such by the BIOS; at least, one can talk to the NetBSD
>> boot prompt with it.
>> 
>> The problem occurs while it is probing the USB space -- it hangs when 
>> it gets to that device.  Has anyone seen this?  Any fix for it?
>
>I've not seen that problem before.  Have you tried turning off
>the USB-to-PS/2 emulation in BIOS?

I didn't see any such option.  But I tried the same keyboard on a Dell 
running the same version of -current, and it worked.  This does make it 
seem likely that it's BIOS-related.

		--Prof. Steven M. Bellovin, http://www.cs.columbia.edu/~smb