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

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Date:	Tue, 01 Apr 2014 01:37:21 +0200
From:	Manuel Krause <manuelkrause@...scape.net>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
	rui.zhang@...el.com
CC:	Guenter Roeck <linux@...ck-us.net>,
	Jean Delvare <jdelvare@...e.de>, lm-sensors@...sensors.org
Subject: Re: 3.13.?: Strange / dangerous fan policy...

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

I've tried the tmon tool, now, too. Nice eyecandy and for monitoring!

I've tried to revert all "thermal" related patches from 
3.12.14->3.13.7 from 3.13.7. But they don't seem to matter. (Even 
if I apply the vice-versa patch to 3.12.15.)

So "thermal" is out?

For the failing kernels: Not any reached trip point (active) 
triggers ONE fan action!

Next would be ACPI, to be investigated,

THX for this audience,
Manuel Krause

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