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Date:	Sun, 30 Sep 2012 21:37:43 +0800
From:	Feng Tang <>
To:	Toralf Förster <>
Cc:	Samuel Ortiz <>,
	Linux Kernel <>,
	Daniel Mack <>
Subject: Re: hot CPU with 3.6.0-rc7+ and intel graphic

Hi Toralf,

On Sat, 29 Sep 2012 10:16:11 +0200
Toralf Förster <> wrote:

> Hello,
> I'm observed hot CPUs at my ThinkPad T420 (i5-2540M CPU) w/ integrated
> intel graphic with current git
> Powertop-2.1 shows that the GPU is always at 100%.

Where can we get a powertop-2.1? I searched google and found 
git clone git://
is null now.

> .config is attached

Really weird, my commit only change the lpc_ich.c which affects the TCO_WDT
driver. but from your .config file, neither CONFIG_LPC_ICH nor the
 CONFIG_ITCO_WDT is enabled, which means the commit should not affect
your kernel, could you double check the .config file?

> I bisected this to
> commit a0e35322910555e20e9eced3f050a76c7b3a1f92
> Author: Feng Tang <>
> Date:   Thu Aug 16 15:50:10 2012 +0800
>     mfd: lpc_ich: Fix a 3.5 kernel regression for iTCO_wdt driver
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