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Re: kern/46198: ichlpcib watchdog is not reset
The following reply was made to PR kern/46198; it has been noted by GNATS.
From: Manuel Bouyer <bouyer%antioche.eu.org@localhost>
Cc: kern-bug-people%NetBSD.org@localhost, gnats-admin%NetBSD.org@localhost,
Hauke Fath <hf%spg.tu-darmstadt.de@localhost>
Subject: Re: kern/46198: ichlpcib watchdog is not reset
Date: Thu, 15 Mar 2012 23:50:52 +0100
On Thu, Mar 15, 2012 at 12:40:04PM +0000, Hauke Fath wrote:
> > Does it also happen if you don't activate in in the BIOS?
> If I do not activate the watchdog in BIOS, it does not kick in.
> > wdogctl should activate it too ...
> ...even if it has been explicitely disabled in BIOS?
Yes. I think what the BIOS does is to setup the countdown, so that if
the boot hangs before the OS could deal with the watchdog itself,
the system resets (I doubt that the next boot would be more successfull,
so I'm not sure this is really usefull).
> > if not activated by the bios, but you activate it with wdogctl -e and
> > let it expire, does the system reset?
> ...yes, after a 'wdogctl -p 20 -e ichlpcib0' it does reset.
OK, so the watchdog is really working when setup by the OS; but when setup
by BIOS the OS fails to reset it.
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
NetBSD: 26 ans d'experience feront toujours la difference
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