I've got a new Dell GX620 that I installed NetBSD 3.0_BETA on
November 17th.  I directly installed GENERIC.MPACPI because
the machine has hyperthreading.  After some fiddling with
the USB ports today, and having them just quit responding after
moving things around, I tried a GENERIC kernel.  The GENERIC
kernel doesn't even see all the hubs, in particular the one
the keyboard and mouse are connected to, and not surprisingly,
the GENERIC.MP kernel also doesn't see the keyboard or mouse.
GENERIC.MPACPI does see the keyboard and mouse, at least
initially, and if nothing gets removed or changed.

And, as an additional problem, I can't drop into the debugger
from the display from the GENERIC.MPACPI kernel now.  (I don't
know if that's true for the other kernels, as I have no keyboard
to type control-alt-esc with.)

I tried a current GENERIC kernel, and the keyboard and mouse,
and all the hubs are found properly.  I haven't yet tried
getting into the debugger, because at this point I was remote.

The machine has no PS/2 ports.  Anyone know which changes to
the USB drivers need to be pulled up?  I can test them easily
enough.

http://gendalia.org/NetBSD/messages.0 contains the messages
file from booting NetBSD 3.0_RC5 (GENERIC) & NetBSD 3.99.13
(GENERIC).  http://gendalia.org/NetBSD/messages.1 contains
the messages file since install, with GENERIC.MPACPI from
3.0_BETA & 3.0_RC5, as well as GENERIC & GENERIC.MP from 
3.0_RC5.  I did update the machine to the latest BIOS from
Dell also.

-Tracy