From mboxrd@z Thu Jan  1 00:00:00 1970
From: Owl <owl@umail.ru>
Date: Wed, 09 Feb 2011 14:04:57 +0000
Subject: Re: [lm-sensors] coretemp output changed after loading acpi_cpufreq
Message-Id: <4D529F09.9060200@umail.ru>
List-Id: <lm-sensors.vger.kernel.org>
References: <4D526303.6060506@umail.ru>
In-Reply-To: <4D526303.6060506@umail.ru>
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To: lm-sensors@vger.kernel.org

09.02.2011 13:19, Jean Delvare пишет:
> On Wed, 09 Feb 2011 12:48:51 +0300, Owl wrote:
> >  gentoo ~ # uname -a
> >  Linux gentoo 2.6.36-gentoo-r7 #1 SMP Fri Jan 14 14:34:23 MSK 2011 i686
> >  Intel(R) Atom(TM) CPU N550 @ 1.50GHz GenuineIntel GNU/Linux
> >
> >  gentoo ~ # sensors
> >  coretemp-isa-0000
> >  Adapter: ISA adapter
> >  Core 0:      +18.0°C  (crit = +100.0°C)
> >
> >  coretemp-isa-0001
> >  Adapter: ISA adapter
> >  Core 1:      +22.0°C  (crit = +100.0°C)
> >
> >  gentoo ~ # modprobe acpi_cpufreq
> >  gentoo ~ # sensors
> >  coretemp-isa-0000
> >  Adapter: ISA adapter
> >  Core 0:      +37.0°C  (crit = +100.0°C)
> >
> >  coretemp-isa-0001
> >  Adapter: ISA adapter
> >  Core 1:      +41.0°C  (crit = +100.0°C)
> >
> >  It's normal?
>
> Definitely not.
>
> >  I think, second output is much closer to BIOS values.
>
> This reminds me of
> https://bugzilla.kernel.org/show_bug.cgi?id291
>
> That case was a little different (problem was reportedly introduced by
> cpuidle drivers, rather than solved by cpufreq) but both share the fact
> that apparently digital thermal sensors in Intel CPUs are very
> sensitive to the CPU state. The root cause may be the same.
>
> Len, any idea how to investigate and hopefully fix this?
Additional info, maybe it help:

dmesg: http://codepad.org/2CXxLyLv
kernel config: http://codepad.org/vBsXFiXM
lsmod: http://codepad.org/NY7SixKo

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