Re: regression in linux 3.7 - fan speed at 100% aftersuspend/resume at 100%
From: Zhang Rui
Date: Tue Dec 04 2012 - 09:11:17 EST
please attach the acpidump output.
On Tue, 2012-12-04 at 13:57 +0100, Roberto Oppedisano wrote:
> 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?
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.
> 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
> while the others seem to report normal value. Attached the output of
> dmesg on this laptop.
> More info/testing on request.
> Kind regards
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