Re: ACPI Thermal Shutdown on Boot

[Nate Lawson <nate-Y6VGUYTwhu0@public.gmane.org>]

On Fri, 13 Feb 2004, Pavel Machek wrote:
> > > > If I understand you correctly, 30 seconds is certainly
> > > enough time to burn
> > > > a CPU when the fan has failed, isn't it?
> > >
> > > Our old default poll interval was 30 seconds so this doesn't change
> > > anything.  I know DeadRat takes more than 30 seconds from "shutdown -h
> > > now" to power off.  All modern CPUs have a thermal shutdown builtin.
> > > Think of _CRT as more of "system temp too high, shut down as
> > > soon as you
> > > can."
> >
> >   If I didn't miss something,  Chris Jensen was unable to adjust
> > critical trip point due
> > to current policy. Anyway, 57C isn't a real critical temperature. It
> > doesn't make sense to
> > enter emergent shutdown/power.So we need sane checking here.( A sane
> > _CRT ?)
> >   If FAN is broken, at least we can use throttling to guarantee it will
> > not be over heated.
> > So, throttling should be included into policy about handling critical
> > trip point.
>
> At critical trip point, we have to shut down, according
> to specs. No choice here.
>
> If their ACPI BIOS is b0rken, blacklist them.

My point was that shutdown to poweroff takes about 10 seconds on FreeBSD
but much longer on common Linux distributions.  So even with a little
delay, the system gets shut down at the same time.  This is better than
blacklisting the system (a Compaq laptop) and not having any _CRT
protection.  But Linux can do it however you want.

-Nate


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