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Date: Tue, 21 Oct 2008 10:32:11 -0700
From: Nate Lawson <nate@root.org>
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To: Lars Engels <lme@freebsd.org>
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Cc: acpi@freebsd.org
Subject: Re: acpi_tz1: _CRT value is absurd, ignored (256.0C)
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Lars Engels wrote:
> Hi all,
> 
> every few seconds I get this kernel message on the console:
> 
> acpi_tz1: _CRT value is absurd, ignored (256.0C)
> 
> FreeBSD 8-CURRENT
> HP Compaq 8710w Notebook
> 
> # sysctl hw.acpi.thermal
> hw.acpi.thermal.min_runtime: 0
> hw.acpi.thermal.polling_rate: 10
> hw.acpi.thermal.user_override: 0
> hw.acpi.thermal.tz0.temperature: 48.0C
> hw.acpi.thermal.tz0.active: 5
> hw.acpi.thermal.tz0.passive_cooling: 0
> hw.acpi.thermal.tz0.thermal_flags: 0
> hw.acpi.thermal.tz0._PSV: -1
> hw.acpi.thermal.tz0._HOT: -1
> hw.acpi.thermal.tz0._CRT: 105.0C
> hw.acpi.thermal.tz0._ACx: 98.0C 88.0C 76.0C 65.0C 55.0C 45.0C -1 -1 -1 -1
> hw.acpi.thermal.tz0._TC1: -1
> hw.acpi.thermal.tz0._TC2: -1
> hw.acpi.thermal.tz0._TSP: -1
> hw.acpi.thermal.tz1.temperature: 70.0C
> hw.acpi.thermal.tz1.active: 2
> hw.acpi.thermal.tz1.passive_cooling: 1
> hw.acpi.thermal.tz1.thermal_flags: 0
> hw.acpi.thermal.tz1._PSV: 97.0C
> hw.acpi.thermal.tz1._HOT: -1
> hw.acpi.thermal.tz1._CRT: -1
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> hw.acpi.thermal.tz1._ACx: 89.0C 83.0C 60.0C 50.0C 40.0C -1 -1 -1 -1 -1
> hw.acpi.thermal.tz1._TC1: 1
> hw.acpi.thermal.tz1._TC2: 2
> hw.acpi.thermal.tz1._TSP: 300

We could try to work around it in the tz poll routine.  Or, you could
set the _CRT value to something reasonable via sysctl.  man acpi_thermal
to see how.  You have to specify user_override to unlock the sysctl.
105C seems reasonable based on other settings in tz2-3.

-- 
Nate