[patch] enhance powerd(8) to handle max temperature

[M. Warner Losh]

In message: <46B25AD0.70706 at root.org>
            Nate Lawson <nate at root.org> writes:
: Warner Losh wrote:
: > From: Nate Lawson <nate at root.org>
: > Subject: Re: [patch] enhance powerd(8) to handle max temperature
: > Date: Thu, 02 Aug 2007 10:08:33 -0700
: > 
: >> M. Warner Losh wrote:
: >>> I keep getting the system shutting down on my HP by FreeBSD because
: >>> the temperature exceeds the _CRT value.  Maybe there's something wrong
: >>> with my values, since it happens a lot:
: >>>
: >>> hw.acpi.thermal.min_runtime: 0
: >>> hw.acpi.thermal.polling_rate: 10
: >>> hw.acpi.thermal.user_override: 0
: >>> hw.acpi.thermal.tz0.temperature: 0.0C
: >>> hw.acpi.thermal.tz0.active: -1
: >>> hw.acpi.thermal.tz0.passive_cooling: 1
: >>> hw.acpi.thermal.tz0.thermal_flags: 0
: >>> hw.acpi.thermal.tz0._PSV: 90.0C
: >>> hw.acpi.thermal.tz0._HOT: -1
: >>> hw.acpi.thermal.tz0._CRT: 94.0C
: >>> hw.acpi.thermal.tz0._ACx: 40.0C -1 -1 -1 -1 -1 -1 -1 -1 -1
: >>>
: >>> Note: temperature is always 0.0C.
: >>>
: >>> What can I do to help my situation, if I really want the kernel doing
: >>> the cooling?
: >> Your embedded controller is timing out.  Thus you're getting a bogus
: >> value for _TMP.
: >>
: >> Those settings for _CRT appear correct.  It's the "measured" temperature
: >> that is wrong.
: > 
: > So how do I track down the problem?  I'm tired of the system just
: > shutting down when I'm building OOO or even something simpler like
: > doing a buildworld...
: 
: You do what's #1 on my list, which is rewrite the EC driver event model
: (yet again) and figure out if it's possible to automatically detect
: which workarounds are needed.  Linux requires you to specify boot-time
: flags to select polled or event-driven work.

Hmmm.  OK.

Warner