linux-kernel - Re: 2.6.22 regression: thermal trip points

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Message-Id: <200708021756.32802.lenb@kernel.org>
Date:	Thu, 2 Aug 2007 17:56:32 -0400
From:	Len Brown <lenb@...nel.org>
To:	Adrian Schröter <adrian@...e.de>
Cc:	trenn@...e.de, Knut Petersen <Knut_Petersen@...nline.de>,
	linux-kernel@...r.kernel.org, Andrew Morton <akpm@...l.org>,
	pavel@....cz, mjg59@...f.ucam.org,
	"Zhang, Rui" <rui.zhang@...el.com>,
	Jean Delvare <khali@...ux-fr.org>,
	Alexey Starikovskiy <aystarik@...il.com>,
	linux-acpi@...r.kernel.org
Subject: Re: 2.6.22 regression: thermal trip points

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@...el.com

thanks,
-Len
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