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

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Date:	Tue, 19 Feb 2013 18:54:25 +0100
From:	Salvatore Sisinni <s.sisinni@...il.com>
To:	Zhang Rui <rui.zhang@...el.com>
Cc:	Roberto Oppedisano <roberto.oppedisano@...racom.it>,
	LKML <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>, eduardo.valentin@...com
Subject: Re: regression in linux 3.7 - fan speed at 100% after suspend/resume
 at 100%

Hello Rui,

same problem here with kernel-3.7.8-202.fc18.x86_64
but fan speed after resume with kernel-3.6.10-4.fc18.x86_64  seems ok
acpidump and sys/class/thermal/  details are attached

Kind Regards
Salvatore

On Wed, Dec 19, 2012 at 3:30 PM, Roberto Oppedisano
<roberto.oppedisano@...racom.it> wrote:
> Hi,
>     any news about this issue ? I'm still seeing the problem with the
> released 3.7 (and also with 3.7.1).
> Let me know if you need more info or testing.
>
> Kind regards
> R
>
> Il 05/12/2012 08:30, Roberto Oppedisano ha scritto:
>>
>> Hello Rui
>>
>> Il 04/12/2012 15:11, Zhang Rui ha scritto:
>>>
>>> Hi, Roberto,
>>>
>>> please attach the acpidump output.
>>
>>
>> attached.
>>
>>> On Tue, 2012-12-04 at 13:57 +0100, Roberto Oppedisano wrote:
>>>>
>>>> Hello,
>>>>       with recent kernels after a suspend/resume cycle on my laptop (HP
>>>> 6730b) the fans stays at full speed.
>>>
>>> does the fan keep running at full speed after resume?
>>
>>
>> yes, the fan never stops and runs always at full speed.
>>
>>
>>> please attach the output of "grep . /sys/class/thermal/*/*" before
>>> suspend and when the fan is running at full speed.
>>> please attach the same stuff in a good kernel.
>>
>>
>> See attached files.
>> 3.6.9 is the good kernel where the fan behaves correctly.
>> 3.7.0+git is the bad one.
>>
>> Kind regards
>> R
>>
>>>
>>>
>>> thanks,
>>> rui
>>>
>>>
>>>> I've bisected down to this commit:
>>>>
>>>> ce119f83257aae29b84a5bfad0669e8348437b18 is the first bad commit
>>>> commit ce119f83257aae29b84a5bfad0669e8348437b18
>>>> Author: Zhang Rui <rui.zhang@...el.com>
>>>> Date:   Wed Jun 27 14:13:04 2012 +0800
>>>>
>>>>       Thermal: Introduce simple arbitrator for setting device cooling
>>>> state
>>>>
>>>>       This fixes the problem that a cooling device may be referenced by
>>>>       by multiple trip points in multiple thermal zones.
>>>>
>>>>       With this patch, we have two stages for updating a thermal zone,
>>>>       1. check if a thermal_instance needs to be updated or not
>>>>       2. update the cooling device, based on the target cooling state
>>>>          of all its instances.
>>>>
>>>>       Note that, currently, the cooling device is set to the deepest
>>>>       cooling state required.
>>>>
>>>>       Signed-off-by: Zhang Rui <rui.zhang@...el.com>
>>>>       Reviewed-by: Rafael J. Wysocki <rjw@...k.pl>
>>>>       Reviewed-by: Eduardo Valentin <eduardo.valentin@...com>
>>>>
>>>> :040000 040000 8469b057ee5b33bdb264624db35c951d0ecdb66b
>>>> d7288437cff3c7437e59144c46c04c78669a597b M      drivers
>>>> :040000 040000 397296161d55c825f07501470130928d226497cc
>>>> f715fd1770dd33fd333c5fa339e740537b2a916f M      include
>>>>
>>>> I tried to revert it but there are rejects so I cold not try current
>>>> kernel with simply this commit removed.
>>>>
>>>> As a side note when the fan is at full speed a see an anomaly on thermal
>>>> indicator #4
>>>>
>>>> $ grep 0 /sys/devices/virtual/thermal/thermal_zone*/temp
>>>> /sys/devices/virtual/thermal/thermal_zone0/temp:59000
>>>> /sys/devices/virtual/thermal/thermal_zone1/temp:63000
>>>> /sys/devices/virtual/thermal/thermal_zone2/temp:48000
>>>> /sys/devices/virtual/thermal/thermal_zone3/temp:27900
>>>> /sys/devices/virtual/thermal/thermal_zone4/temp:100000
>>>>
>>>> while the others seem to report normal value. Attached the output of
>>>> dmesg on this laptop.
>>>>
>>>> More info/testing on request.
>>>>
>>>> Kind regards
>>>> R
>>>
>>>
>>>
>>
>
>
> --
> Roberto Oppedisano
> Infracom Italia S.p.A.
> Ingegneria d'offerta
> Tel. +39 0459692691
> Mob. +39 3487419534
>
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