Re: Linux 2.6.25 (coretemp reads high temperatures)

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On Friday 18 April 2008, Matthew wrote:
> Hi everyone, hi Linus,
> 
> congratulations on this new great kernel-release :)
> 
> I've another "regression" to report for 2.6.25:
> 
> it's concerning much higher temperatures being read out by the
> "coretemp" kernel-module in comparison to 2.6.24* series
> 
> e.g. where temperatures were around 40-47°C they are now constantly
> jumping around 55-70°C (even in idle !)
> 
> several other users/testers have reported this issue too (both on
> zen-sources [heavy patched] & latest gentoo-sources) [slightly
> patched]:
> 
> http://forums.gentoo.org/viewtopic-t-684812-highlight-.html
> 
> if I understood git right it (also) happens in conjunction with an 3
> weeks old acpi-snapshot
> (http://repo.or.cz/w/linux-2.6/zen-sources.git?a=heads) integrated in
> zen-sources
> 
> I can "reproduce" this on an Intel Core 2 Duo 6600 (Conroe) with a P5W
> DH Deluxe mainboard (by Asus) since at least 2.6.25-rc8 (or possibly
> also rc7)
> 
> the temperatures on mobile core (2) duo intel processors [e.g. an
> T7500] seem to be read out correctly - I can't tell it exactly but
> this seems to be an entirely "cosmetical" issue
> (hopefully it's not the opposite and the values are now read out
> correctly since such high temps would be very worrying ;) )
> 
> Keep up the great work & please don't forget your growing amount of
> linux-desktop users :)
> 
> Regards
> 
> Mat

Hello Mat,
I'm not familiar with "coretemp", can you point me to the exact version
of the application you are running so I can see how it is getting at
the underlying information?

Also, do you see any change with and without kernel built with CONFIG_THERMAL=y?

thanks,
-Len
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