From: Len Brown <lenb@kernel.org>
Organization: Intel Open Source Technology Center
To: Adrian =?utf-8?q?Schr=C3=B6ter?= <adrian@suse.de>
Subject: Re: 2.6.22 regression: thermal trip points
Date: Thu, 2 Aug 2007 17:56:32 -0400
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Cc: trenn@suse.de, Knut Petersen <Knut_Petersen@t-online.de>,
       linux-kernel@vger.kernel.org, Andrew Morton <akpm@osdl.org>,
       pavel@ucw.cz, mjg59@srcf.ucam.org, "Zhang, Rui" <rui.zhang@intel.com>,
       Jean Delvare <khali@linux-fr.org>,
       Alexey Starikovskiy <aystarik@gmail.com>, linux-acpi@vger.kernel.org
References: <46B1988C.3090302@t-online.de> <1186047747.18821.450.camel@queen.suse.de> <200708021145.09377.adrian@suse.de>
In-Reply-To: <200708021145.09377.adrian@suse.de>
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On Thursday 02 August 2007 05:45, Adrian Schröter wrote:
> On Thursday 02 August 2007 11:42:27 wrote Thomas Renninger:
> > On Thu, 2007-08-02 at 10:40 +0200, Knut Petersen wrote:
> > > Hi everybody!
> > >
> > > Kernel 2.6.22 decreases performance by about 50% on my system.
> > > No, I do not like that. The reason is a broken BIOS, granted, but there
> > > was a perfect workaround in the kernel that has been dropped.
> > >
> > > mainboard: AOpen i915GMm-hfs, AWARD BIOS
> > > cpu: Pentium-M 750 (0.8 to 1.86 MHz)
> > > openSuSE 10.2 with kernel 2.6.22.1
> >
> > Is this a DELL laptop that gets throttled by 75% to throttling state 6
> > if 60 degrees are exceeded?
> > Adrian has such a machine..., no idea what is going on with that one,
> > but only workaround to get any use out of this machine is to override at
> > least the passive trip point.
> 
> JFYI, there are plenty of these systems around, it was one out of four 
> standard Novell modells. I am mabye just the first one who uses Factory on 
> it, but expect more bugreports when 10.3 gets released ...

That's very good news, Adrian.  In the past all we had to go on
was the memory of a machine that died several years ago.
But if you've got a live failure, that is really valuable.

Please go here
http://bugzilla.kernel.org/enter_bug.cgi?product=ACPI
and submit a new sighting vs. Power-Thermal
and attach the output from acpidump, cat /proc/acpi/thermal_zone/*/*
and assign it to len.brown@intel.com

thanks,
-Len
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