6.1-PRE boot locks up, using USB keyboard

[Rick C. Petty]

Hello.  I cvsup'd to 6.1-PRERELEASE today (Mar 14 2006), installed world,
and tried booting the GENERIC kernel.  My machine hangs after the following
messages:

pmtimer0 on isa0
orm0: <ISA Option ROM> at iomem 0xd0000-0xd3ffff on isa0
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0

(None of the other visible messages pertain to the keyboard or USB, and I
can't scroll back)

I'm using a USB keyboard, no PS/2.  I've tried the hint to disable kbdmux,
I've tried with and without selecting the "Boot w/ USB keyboard" and the
machine locks up in the same spot no matter what I try.  The same hardware
boots just fine with 6.0-RELEASE (although I need to choose the USB
keyboard option if I plan on typing).  Any suggestions?

-- Rick C. Petty