linux-kernel - Re: [REGRESSION] 3.15: Seems to turbo mode Intel Sandybridge Dual Core without need, overheating CPU

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Message-ID: <2227580.NQeh4KI5E8@merkaba>
Date:	Tue, 10 Jun 2014 11:31:01 +0200
From:	Martin Steigerwald <Martin@...htvoll.de>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org
Subject: Re: [REGRESSION] 3.15: Seems to turbo mode Intel Sandybridge Dual Core without need, overheating CPU

Am Dienstag, 10. Juni 2014, 00:29:52 schrieb Rafael J. Wysocki:
> On Tuesday, June 10, 2014 12:20:20 AM Rafael J. Wysocki wrote:
> > On Monday, June 09, 2014 11:41:40 PM Martin Steigerwald wrote:
> > > Am Montag, 9. Juni 2014, 23:33:43 schrieb Martin Steigerwald:
> > > > Hi!
> > > > 
> > > > Added linux-pm to Cc. Also reboots seems to fix up the condition:
> > > > 
> > > > merkaba:~> grep . /sys/devices/system/cpu/cpu[0-3]/cpufreq/cpuinfo_cur_freq
> > > > /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq:830957
> > > > /sys/devices/system/cpu/cpu1/cpufreq/cpuinfo_cur_freq:819628
> > > > /sys/devices/system/cpu/cpu2/cpufreq/cpuinfo_cur_freq:800000
> > > > /sys/devices/system/cpu/cpu3/cpufreq/cpuinfo_cur_freq:813476
> > > > merkaba:~> sensors                                                         
> > > > acpitz-virtual-0
> > > > Adapter: Virtual device
> > > > temp1:        +71.0°C  (crit = +98.0°C)
> > > > 
> > > > coretemp-isa-0000
> > > > Adapter: ISA adapter
> > > > Physical id 0:  +71.0°C  (high = +86.0°C, crit = +100.0°C)
> > > > Core 0:         +70.0°C  (high = +86.0°C, crit = +100.0°C)
> > > > Core 1:         +71.0°C  (high = +86.0°C, crit = +100.0°C)
> > > > 
> > > > thinkpad-isa-0000
> > > > Adapter: ISA adapter
> > > > fan1:        3137 R
> > > > 
> > > > 
> > > > Still hot in here and after reboot and login into KDE session there is quite
> > > > some CPU activity for a while.
> > > > 
> > > > But way better than before.
> > > > 
> > > > I can test whether this also happens with ACPI cpufreq driver.
> > > > 
> > > > I think I didn´t see this with 3.14.
> > > 
> > > Its not just me:
> > > 
> > > Please change intel_pstate default to disable
> > > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1188647
> > 
> > Did you test the 3.15-rc kernels?  If so, do they have this problem too?
> 
> Or is that just you have tried intel_pstate for the first time?

No. Have intel_pstate running since some kernel releases.

-- 
Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
GPG: 03B0 0D6C 0040 0710 4AFA  B82F 991B EAAC A599 84C7
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