RE: How can a critical temperature be set?

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> -----Original Message-----
> From: Rafael J. Wysocki [mailto:rjw@xxxxxxxxxxxxx]
> Sent: Friday, November 29, 2013 8:26 PM
> To: Thomas Mitterfellner
> Cc: linux-acpi@xxxxxxxxxxxxxxx; Zhang, Rui
> Subject: Re: How can a critical temperature be set?
> Importance: High
> 
> Cc: Rui
> 
> On Friday, November 29, 2013 10:06:12 AM Thomas Mitterfellner wrote:
> > Hello!
> >
> > How can I set a thermal trip point for the critical temperature as
> > shown by acpi -V? (My laptop, Toshiba Satellite Pro l770-116, intel
> > HM65 chipset, shuts down frequently under high CPU load and I suspect
> > too low a critical temperature setting, namely 84°C, to be the
> > culprit, as I read that 91+°C are not uncommon for my system under
> > heavy load)
> >
> > I asked at the lm-sensors mailing list and I was advised to ask here.
> > I was told that I might have to edit the DSDT tables to accomplish
> > this. Is there possibly some simpler way or can someone give me a
> hint
> > on how to do this?
> > What I want to accomplish is: I want to set (increase) the
> temperature
> > temp_crit1 shown in the output of sensors -u for the virtual device
> > acpitz-virtual-0.
> >

Yes, there is a module parameter "thermal.crt=" for this.
Say, you can reset the critical temperature to 110C via thermal.crt=110.

Thanks,
Rui

> > Thank you for your help,
> >
> > Thomas
> >
> >
> > For reference, I attached the output of acpi -V and sensors -u
> commands.
> >
> > # acpi -V
> > […]
> > Thermal 0: ok, 57.0 degrees C
> > Thermal 0: trip point 0 switches to mode critical at temperature 84.0
> > degrees C Thermal 0: trip point 1 switches to mode passive at
> > temperature 105.0 degrees CThermal 0: ok, 57.0 degrees C Thermal 0:
> > trip point 0 switches to mode critical at temperature 84.0 degrees C
> > Thermal 0: trip point 1 switches to mode passive at temperature 105.0
> > degrees C:
> > […]
> >
> > # sensors -u
> >
> > acpitz-virtual-0
> > Adapter: Virtual device
> > temp1:
> >   temp1_input: 73.000
> >   temp1_crit: 84.000
> >
> > coretemp-isa-0000
> > Adapter: ISA adapter
> > Physical id 0:
> >   temp1_input: 71.000
> >   temp1_max: 86.000
> >   temp1_crit: 100.000
> >   temp1_crit_alarm: 0.000
> > Core 0:
> >   temp2_input: 71.000
> >   temp2_max: 86.000
> >   temp2_crit: 100.000
> >   temp2_crit_alarm: 0.000
> > Core 1:
> >   temp3_input: 71.000
> >   temp3_max: 86.000
> >   temp3_crit: 100.000
> >   temp3_crit_alarm: 0.000
> >
> > pkg-temp-0-virtual-0
> > Adapter: Virtual device
> > temp1:
> >   temp1_input: 71.000
> > --
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> --
> I speak only for myself.
> Rafael J. Wysocki, Intel Open Source Technology Center.
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