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Message-ID: <50BEF830.6020206@gmail.com> Date: Wed, 05 Dec 2012 08:30:56 +0100 From: Roberto Oppedisano <roberto.oppedisano@...il.com> To: Zhang Rui <rui.zhang@...el.com> CC: 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 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 > > Download attachment "acpidump.good.bz2" of type "application/octet-stream" (116095 bytes) View attachment "systhermal-3.6.9-aftersuspend.txt" of type "text/plain" (3962 bytes) View attachment "systhermal-3.7.0+git-presuspend.txt" of type "text/plain" (3962 bytes) View attachment "systhermal-3.7.0+git-aftersuspend.txt" of type "text/plain" (3967 bytes) View attachment "systhermal-3.6.9-presuspend.txt" of type "text/plain" (3962 bytes)
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