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Date:      Mon, 11 Nov 2002 22:46:01 +0100
From:      Thomas Moestl <tmoestl@gmx.net>
To:        Gavin Atkinson <gavin.atkinson@ury.york.ac.uk>
Cc:        sparc@FreeBSD.ORG
Subject:   Re: Reproducable panic on Ultra 5
Message-ID:  <20021111214601.GC308@crow.dom2ip.de>
In-Reply-To: <Pine.BSF.4.33.0211112118020.53225-100000@ury.york.ac.uk>
References:  <20021111194723.GB308@crow.dom2ip.de> <Pine.BSF.4.33.0211112118020.53225-100000@ury.york.ac.uk>

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On Mon, 2002/11/11 at 21:23:38 +0000, Gavin Atkinson wrote:
> On Mon, 11 Nov 2002, Thomas Moestl wrote:
> > On Mon, 2002/11/11 at 19:16:03 +0000, Gavin Atkinson wrote:
> > >
> > > I can reliably panic my Ultra 5 by simply pressing the front power button.
> >
> > Can you please test whether the attached patch fixes that?
> 
> Yes, that fixes the panic. Thanks! Although the power button actually
> resets the machine rather than poweres it down, but I can live with that.

It would just as easy to power it down. This is not done currently
because the interrupt sent when you press the power button is a bit
ill-defined. The documentation mentions it as "power fail interrupt",
so we just try to shut down as quickly as possible to prevent data
loss but do not power off so that the administrator can diagnose the
problem.
FWIW, the number of models on which pressing the power button causes
this interrupt is quite limited (IIRC it is only done on Ultra 5s and
Ultra 10s).

	- Thomas

-- 
Thomas Moestl <tmoestl@gmx.net>	http://www.tu-bs.de/~y0015675/
              <tmm@FreeBSD.org>	http://people.FreeBSD.org/~tmm/
PGP fingerprint: 1C97 A604 2BD0 E492 51D0  9C0F 1FE6 4F1D 419C 776C

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