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Date: Mon, 27 Feb 2006 22:36:12 +0100
From: Olaf Hering <olh@suse.de>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Subject: Re: copying /sys causes fans to spin up
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 On Mon, Feb 27, Olaf Hering wrote:

>  On Tue, Feb 28, Benjamin Herrenschmidt wrote:
> 
> > On Mon, 2006-02-27 at 17:09 +0100, Olaf Hering wrote:
> > > Ben, 
> > > 
> > > 
> > > some tool copies /sys, and while doing it, the fans start to spin up on
> > > my G5. Any idea how to fix it, other than not reading from /sys? Have to
> > > find the exact file.
> > 
> > Interesting... it's causing the i2c bus to go nuts... It would be useful
> > to find out what file indeed...
> 
> For Olof it was /sys/devices/platform/windfarm.0/hd-temp, but I cant
> test it right now.

my dmesg has:

windfarm: failed to attach ds1775 hd-temp to i2c
windfarm: failed to attach MAX6690 sensor


Maybe thats harmless, but I have seen it on a few different G5.