linux-kernel - Re: regression in linux 3.7 - fan speed at 100% after suspend/resume at 100%

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Date:	Sat, 09 Mar 2013 18:50:54 +0100
From:	Sascha Wilde <wilde@...-bang.de>
To:	Roberto Oppedisano <roberto.oppedisano@...racom.it>,
	Salvatore Sisinni <s.sisinni@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: regression in linux 3.7 - fan speed at 100% after suspend/resume at 100%

Hi *,

same problem here on my HP Compaq 6910p.

I just tested with vanilla linux 3.8.2 -- unfortunately the problem
still persists.[1][2]  The last (stable) kernel working for me is 3.6.11.

I'll happily provide any additional information which might help getting
this fixed.  Just ask... :)

Please CC me in any response, for I'm not subscribed to lkml.

cheers
sascha

[1]  FWIW, self build vanilla linux 3.8.2 with very generic config on
     Debian Wheezy 64bit.
[2]  FWIW², I'm under the stron impression that the whole fan control
     changed in the latest vanilla kernels on my 6910p even before doing
     a suspend/resume -- it seems to be more "binary" if you will, in
     that the fan is not running at all for a while and then at a 100%
     to return back to 0% after doing some serious cooling.  With 3.6.11
     and older it is more "analogue", with slow fan when only a bit
     cooling is needed.  No idea if this is related to the issue at
     hand.
-- 
Sascha Wilde

If you think technology can solve your problems you don't understand
technology and you don't understand your problems.  (Bruce Schneier)
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