Date: Thu, 26 Mar 2009 21:46:57 +0000 From: Chris Whitehouse <cwhiteh@onetel.com> To: "Alexandre \"Sunny\" Kovalenko" <gaijin.k@gmail.com> Cc: freebsd-acpi@FreeBSD.org, Ian Smith <smithi@nimnet.asn.au> Subject: Re: acpi_tz0: _CRT value is absurd, ignored (256.0C) (was pr kern/105537) Message-ID: <49CBF7D1.20102@onetel.com> In-Reply-To: <1237992462.1297.22.camel@RabbitsDen> References: <49C80E65.9090500@onetel.com> <49C93309.6050708@iki.fi> <20090325140718.J95588@sola.nimnet.asn.au> <49C9EE50.6070507@onetel.com> <1237992462.1297.22.camel@RabbitsDen>
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Alexandre "Sunny" Kovalenko wrote:
> To be fair, if all you want is to override _CRT, you should be able to
> put something to the tune of
>
> hw.acpi.thermal.user_override=1
> hw.acpi.thermal.tz0._CRT=90C
>
> in your /etc/sysctl.conf and not deal with the ASL at all.
I tried this and it sets hw.acpi.thermal.tz0._CRT correctly until
hw.acpi.thermal.tz0.active and hw.acpi.thermal.tz0.temperature change
values at which point hw.acpi.thermal.tz0._CRT reverts to -1.
At idle having set hw.acpi.thermal.tz0._CRT to 90C with sysctl:
chrisw@muji% sysctl hw.acpi.thermal.tz0
hw.acpi.thermal.tz0.temperature: 55.0C
hw.acpi.thermal.tz0.active: 3
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: 90.0C
hw.acpi.thermal.tz0._ACx: 80.0C 70.0C 60.0C 45.0C -1 -1 -1 -1 -1 -1
hw.acpi.thermal.tz0._TC1: -1
hw.acpi.thermal.tz0._TC2: -1
hw.acpi.thermal.tz0._TSP: -1
Heat it up a bit with cpuburn:
chrisw@muji% sysctl hw.acpi.thermal.tz0
hw.acpi.thermal.tz0.temperature: 60.0C
hw.acpi.thermal.tz0.active: 2
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: -1
hw.acpi.thermal.tz0._ACx: 80.0C 70.0C 55.0C 45.0C -1 -1 -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.tz0._CRT will now stay at -1 until I reset it with sysctl.
So I suppose I need to find out where hw.acpi.thermal.tz0._CRT is
getting its value from - which must be the ASL.
acpidump -td says
ThermalZone (TZ0)
{
snip
Method (_CRT, 0, Serialized)
{
Return (C316 (0x04, 0x00))
}
snip
}
The whole asl is fetch(1)able as www.fishercroft.plus.com/nc6320.asl.gz
Watching /var/log/messages I can't see a correlation between when the
warning messages appear and changing the temperature states so I don't
even know what is actually triggering them.
I've started reading the ACPI specs as suggested but in the meantime all
suggestions welcome.
Thanks
Chris
>
> You might want to take a look at your output of 'sysctl hw.acpi.thermal'
> -- your specific thermal zone, might be different from the one, I have
> used as an example above. In fact, on my laptop, it is tz1 and not tz0.
>
> In either case, I would recommend reading thermal chapter of the ACPI
> specification -- it is short, well-written and has an example, I was
> stealing stuff from, shamelessly, in the past.
>
> HTH,
>
help
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