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

[Roberto Oppedisano]

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@xxxxxxxxx>
> > > 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@xxxxxxxxx>
> > >       Reviewed-by: Rafael J. Wysocki <rjw@xxxxxxx>
> > >       Reviewed-by: Eduardo Valentin <eduardo.valentin@xxxxxx>
> > >
> > > :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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