Checking CPU temperature

[Patrick O'Callaghan]

On Fri, 2008-06-13 at 03:10 -0400, Ric Moore wrote:
> On Thu, 2008-06-12 at 10:27 -0430, Patrick O'Callaghan wrote:
> > On Thu, 2008-06-12 at 09:41 -0500, Aaron Konstam wrote:
> > > On Wed, 2008-06-11 at 18:05 -0430, Patrick O'Callaghan wrote:
> > > > On Wed, 2008-06-11 at 17:01 -0500, Aaron Konstam wrote:
> > > > > On Wed, 2008-06-11 at 16:06 +0100, Paul Smith wrote:
> > > > > > Dear All,
> > > > > > 
> > > > > > In the output below, where should I look for the CPU temperature? The value
> > > > > > 
> > > > > > CPU Temp:     -2.0°C  (low  = +127.0°C, high = +127.0°C)  sensor = transistor
> > > > > > 
> > > > > > seems unlikely. Or is -2.0°C realistic?
> > > > > > 
> > > > > > Is there some other program to check the CPU temperature?
> > > > > > 
> > > > > > Thanks in advance,
> > > > > > 
> > > > > > Paul
> > > > > > 
> > > > > cat  /proc/acpi/thermal_zone/THM/temperature
> > > > > will do it. -2.0C would be a really cold CPU. Colder than ice.
> > > > 
> > > > You need to read the thread from the beginning. The OP has already
> > > > explained that this doesn't work.
> > > > 
> > > > poc
> > > > 
> > > Actually he said: cat  /proc/acpi/thermal_zone/THRM/temperature
> > > would not work since it is supposed to be: THM
> > 
> > Read the whole thing. He said he doesn't have anything
> > in /proc/acpi/thermal_zone, and in fact neither do I.
> 
> Got the directory, as do you, and it's empty for me. Something else to
> fix! <sighs> Ric

I have a suspicion that this might have to do with the coretemp kernel
module, which would explain why it only seems to happen on fairly recent
Intel cpus. The documentation
(/usr/share/doc/kernel-doc-2.6.25/Documentation/hwmon/coretemp) says:

        Supported chips:
          * All Intel Core family
            Prefix: 'coretemp'
            CPUID: family 0x6, models 0xe, 0xf, 0x16, 0x17
            Datasheet: Intel 64 and IA-32 Architectures Software Developer's Manual
                       Volume 3A: System Programming Guide
                       http://softwarecommunity.intel.com/Wiki/Mobility/720.htm

If anyone is seeing the same problem on non-Intel cpus (not mobos), then
coretemp is not the culprit. Anyone?

poc