From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Subject: Re: [REGRESSION] 3.15: Seems to turbo mode Intel Sandybridge Dual Core without need, overheating CPU
Date: Tue, 10 Jun 2014 00:29:52 +0200
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To: Martin Steigerwald <Martin@lichtvoll.de>
Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org

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!
> > >=20
> > > Added linux-pm to Cc. Also reboots seems to fix up the condition:
> > >=20
> > > merkaba:~> grep . /sys/devices/system/cpu/cpu[0-3]/cpufreq/cpuinf=
o_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                                               =
         =20
> > > acpitz-virtual-0
> > > Adapter: Virtual device
> > > temp1:        +71.0=C2=B0C  (crit =3D +98.0=C2=B0C)
> > >=20
> > > coretemp-isa-0000
> > > Adapter: ISA adapter
> > > Physical id 0:  +71.0=C2=B0C  (high =3D +86.0=C2=B0C, crit =3D +1=
00.0=C2=B0C)
> > > Core 0:         +70.0=C2=B0C  (high =3D +86.0=C2=B0C, crit =3D +1=
00.0=C2=B0C)
> > > Core 1:         +71.0=C2=B0C  (high =3D +86.0=C2=B0C, crit =3D +1=
00.0=C2=B0C)
> > >=20
> > > thinkpad-isa-0000
> > > Adapter: ISA adapter
> > > fan1:        3137 R
> > >=20
> > >=20
> > > Still hot in here and after reboot and login into KDE session the=
re is quite
> > > some CPU activity for a while.
> > >=20
> > > But way better than before.
> > >=20
> > > I can test whether this also happens with ACPI cpufreq driver.
> > >=20
> > > I think I didn=C2=B4t see this with 3.14.
> >=20
> > Its not just me:
> >=20
> > Please change intel_pstate default to disable
> > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1188647
>=20
> Did you test the 3.15-rc kernels?  If so, do they have this problem t=
oo?

Or is that just you have tried intel_pstate for the first time?

Rafael