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Date: Sun, 31 Mar 1996 11:47:38 +0200 (MET DST)
From: "Christoph P. Kukulies" <kuku@gilberto.physik.rwth-aachen.de>
Subject: Re: Rebooting
In-reply-to: <199603310829.KAA29827@allegro.lemis.de>
To: grog@lemis.de (Greg Lehey)
Cc: melrobin@Jetson.UH.EDU, questions@freebsd.org
Reply-to: Christoph Kukulies <kuku@gilberto.physik.rwth-aachen.de>
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> 
> 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 he might want to compile a new kernel with 

options BROKEN_KEYBOARD_RESET


> 
> 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
> 
> 

--Chris Christoph P. U. Kukulies kuku@gil.physik.rwth-aachen.de