From owner-freebsd-questions  Sun Mar 31 00:46:05 1996
Return-Path: owner-questions
Received: (from root@localhost)
          by freefall.freebsd.org (8.7.3/8.7.3) id AAA09203
          for questions-outgoing; Sun, 31 Mar 1996 00:46:05 -0800 (PST)
Received: from diablo.ppp.de (diablo.ppp.de [193.141.101.34])
          by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id AAA09197
          for <questions@freebsd.org>; Sun, 31 Mar 1996 00:46:03 -0800 (PST)
Received: from allegro.lemis.de by diablo.ppp.de with smtp
	(Smail3.1.28.1 #1) id m0u3Ilr-000QXwC; Sun, 31 Mar 96 10:45 MET DST
From: grog@lemis.de (Greg Lehey)
Organisation: LEMIS, Schellnhausen 2, 36325 Feldatal, Germany
Phone: +49-6637-919123
Fax:   +49-6637-919122
Received: (grog@localhost) by allegro.lemis.de (8.6.9/8.6.9) 
	id KAA29827; Sun, 31 Mar 1996 10:29:21 +0200
Message-Id: <199603310829.KAA29827@allegro.lemis.de>
Subject: Re: Rebooting
To: melrobin@Jetson.UH.EDU (Melvin Deloyd Robinson)
Date: Sun, 31 Mar 1996 10:29:21 +0200 (MET DST)
Cc: questions@freebsd.org
In-Reply-To: <1.5.4b12.32.19960330183753.0068df5c@jetson.uh.edu> from "Melvin Deloyd Robinson" at Mar 30, 96 12:37:53 pm
X-Mailer: ELM [version 2.4 PL23]
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit
Sender: owner-questions@freebsd.org
X-Loop: FreeBSD.org
Precedence: bulk

Melvin Deloyd Robinson writes:
>
> I have a friend who has installed FreeBSD 2.1-RELEASE on his machine.  Upon
> rebooting he gets an error stating that the Keyboard reboot failed and then
> the machine tries the CPU shutdown.  The later never works and I'm stumped
> about what to tell him.

Tell him to press the Big Red Button (reset button, even if it isn't
red).  This sometimes happens on hardware that doesn't behave the way
FreeBSD expects it to.

> I looked in the code (module vm_machdep.c) and found the error message, but
> can't glean very much from that.  Looking at the dmesg output the sc0 driver
> is from 60h-6Fh which seems correct (at least it agrees with my machine),
> but is this the address for IO_KBD.  The code outputs 0xFE to IO_KBD + 4,
> but is this the same as CTRL-ALT-DELETE?
>
> As you can probably tell from my ramblings that I'm pretty confused.  Please
> help.

You can be pretty sure that the addresses and such are OK.  The
problems in this area are generally a matter of timing, and since the
timing isn't documented, it's difficult to guess how a particular
machine will react.  This isn't just a FreeBSD problem, BTW.  Most PC
UNIX implementations have it, and commercial products like UnixWare
seem to have the most trouble.

Greg