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Date: Mon, 28 Apr 2008 20:19:44 +0200 From: Kasper Sandberg <lkml@...anurb.dk> To: Maxim Levitsky <maximlevitsky@...il.com> Cc: Len Brown <lenb@...nel.org>, Matthew <jackdachef@...il.com>, linux-acpi@...r.kernel.org, torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org Subject: Re: Linux 2.6.25 (coretemp reads high temperatures) On Wed, 2008-04-23 at 11:43 +0300, Maxim Levitsky wrote: > On Saturday, 19 April 2008 04:51:48 Len Brown wrote: > > 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 !) > > I just updated from 2.6.24 to 2.6.25 > (I usually follow whole development cycle, but I was very busy, so I skipped 2.6.25 cycle) > > I confirm this. > I *know* that temperatures reported now are wrong. I too can confirm that it reports incorrect temperatures. I have a Q9450, and this is my "sensors" output: it8718-isa-0290 Adapter: ISA adapter <snip> temp1: +44°C (low = +127°C, high = +127°C) sensor = thermistor temp2: +22°C (low = +127°C, high = +60°C) sensor = diode temp3: -2°C (low = +127°C, high = +127°C) sensor = thermistor vid: +0.000 V coretemp-isa-0000 Adapter: ISA adapter Core 0: +44°C (high = +100°C) coretemp-isa-0001 Adapter: ISA adapter Core 1: +44°C (high = +100°C) coretemp-isa-0002 Adapter: ISA adapter Core 2: +43°C (high = +100°C) coretemp-isa-0003 Adapter: ISA adapter Core 3: +41°C (high = +100°C) temp2 is the cpu temperature(matches bios), temp1 is the northbridge(i think, bios says "system temp"). i have watercooling, and well :P when i touch the "tube", its normal room temperature, and believe me, i would notice if it was 45.. this is with my cpu at idle - at full load on all 4 cores, temp2 says 35, and ~60 on coretemp, and THIS i would surely be able to notice over room temp :) any progress on this bug? > > The reason is that bios did report same temperatures as coretemp in 2.6.24, > moreover some time ago I have run a cpu tool (don't remember its name) on windows > which similar to coretemp reads from each core directly, sensor data , > and I noticed that temperature that bios reports is exactly the average > temperature of both cores > (I had to run this on windows - intel haven't released > drivers for their QST for temperature monitoring from bios - very sad) > > And the driver did say in kernel log that TJMAX is 85C > > Lets at least make a kernel option to override tjmax? > > Best regards, > Maxim Levitsky > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@...r.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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