linux-kernel - Re: 3.13.?: Strange / dangerous fan policy...

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Message-ID: <5340BDCF.6030200@netscape.net>
Date:	Sun, 06 Apr 2014 04:37:03 +0200
From:	Manuel Krause <manuelkrause@...scape.net>
To:	Guenter Roeck <linux@...ck-us.net>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
	rui.zhang@...el.com, Jean Delvare <jdelvare@...e.de>,
	lm-sensors@...sensors.org
Subject: Re: 3.13.?: Strange / dangerous fan policy...

On 2014-04-01 01:47, Guenter Roeck wrote:
> On 03/31/2014 04:37 PM, Manuel Krause wrote:
>> On 2014-03-20 21:21, Manuel Krause wrote:
>>> On 2014-03-11 22:59, Manuel Krause wrote:
>>>> On 2014-03-10 02:49, Manuel Krause wrote:
>>>>> On 2014-03-09 18:58, Rafael J. Wysocki wrote:
>>>>>> On Sunday, March 09, 2014 01:10:25 AM Manuel Krause wrote:
>>>>>>> On 2014-03-08 16:59, Guenter Roeck wrote:
>>>>>>>> On 03/08/2014 03:08 AM, Jean Delvare wrote:
>>>>>>>>> On Fri, 7 Mar 2014 14:52:30 -0800, Guenter Roeck wrote:
>>>>>>>>>> On Fri, Mar 07, 2014 at 11:04:29PM +0100, Manuel Krause
>>>>>>>>>> wrote:
>>> [SNIP]
>>>
>>> Long time no reply from you... Have I overseen a unwritten
>>> convention? Or were my charts that unusable for your
>>> analysis/work?
>>>
>>> Two days ago, I tried the 3.14.0-rc7-vanilla. And the problem
>>> persists. "Strange / dangerous fan policy..."
>>>
>>> Since kernel 3.13.6 I've managed to 'fix' the potential
>>> overheating problem by manually issuing a:
>>> "echo 1 > /sys/class/thermal/cooling_device3/cur_state" *)
>>> _before_ obviously critical temperatures occur. Remind: This
>>> particular setting may only work for my system! ...and keeps
>>> working for 3.14-rc.
>>>
>>> In the following I'd like to present you a modified output of my
>>> /sys/class/thermal, that I've written a script for (for my
>>> system), that shows the results in the way of
>>> linux/Documentation/thermal/sysfs-api.txt, point 3:
>>> {I've uploded the files to pastebin, to not swamp you and the
>>> lists with so many lines of logs.}
>>>
>>> For the last good kernel -- 3.12.14 -- in-use:
>>>   http://pastebin.com/HL1PNcda
>>> For my first bad kernel revision 3.13 -- at critical temp:
>>>   http://pastebin.com/98hgf1a9
>>> For the last bad kernel -- 3.14.0-rc7 -- at critical temp:
>>>   http://pastebin.com/MuTwTnjD
>>> For the last bad kernel -- 3.14.0-rc7 -- after issuing the
>>>   *) command:
>>>   http://pastebin.com/2peda54z
>>>
>>> Please, have a look at them! And maybe, give me hints on how I
>>> can help you to further debug this issue, as my manual method
>>> works but it's annoying.
>>>
>>> And, PLEASE CC: ME, as I'm not on the lists. Or lead this
>>> Email-thread to someone in charge.
>>>
>>> Thank you for your work && best regards,
>>> Manuel Krause
>>>
>>
>> This is still BUG 71711
>> https://bugzilla.kernel.org/show_bug.cgi?id=71711
>>
>> 3.12.15 works very well
>> 3.13.7 fails
>> 3.14.0-rc8 fails
>>
>
> Best you can do would really be to bisect the problem.
> Unfortunately only you (or someone else with an affected system)
> can do that. Once the culprit is known it would be much easier
> to get it fixed.
>
> To answer your earlier question: I don't think you did anything
> wrong.
> I guess everyone else is just as clueless as I am (if not, speak up
> and help ;-).
>
> Guenter
>

I've now bisected two times. From two different kernel origins, 
just to be sure, as I'm new to this stupid-and-lengthy method, 
and, to be sure, I haven't given a false positive inbetween due 
to boredom.

In the end it says each time:
# git bisect bad | tee -a /var/log/bisect.log
cc8ef52707341e67a12067d6ead991d56ea017ca is the first bad commit
commit cc8ef52707341e67a12067d6ead991d56ea017ca
Author: Zhang Rui <rui.zhang@...el.com>
Date:   Wed Sep 25 20:39:45 2013 +0800

     ACPI / AC: convert ACPI ac driver to platform bus

     Signed-off-by: Zhang Rui <rui.zhang@...el.com>
     Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

:040000 040000 5a0d397cfcbf53c03390f2805b83754cb7837d84 
4a2af1454f65d67f1d1a507c08e3b9ef3ffe57e7 M      drivers


Please help me, on how I can help debug this more, and please 
also read the newest from
https://bugzilla.kernel.org/show_bug.cgi?id=71711

Manuel Krause

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