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

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Message-ID: <20070802121556.GA30114@srcf.ucam.org>
Date:	Thu, 2 Aug 2007 13:15:56 +0100
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Thomas Renninger <trenn@...e.de>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Adrian Schröter <adrian@...e.de>,
	Knut Petersen <Knut_Petersen@...nline.de>,
	linux-kernel@...r.kernel.org, Andrew Morton <akpm@...l.org>,
	pavel@....cz, lenb@...nel.org, "Zhang, Rui" <rui.zhang@...el.com>,
	Jean Delvare <khali@...ux-fr.org>,
	Alexey Starikovskiy <aystarik@...il.com>
Subject: Re: 2.6.22 regression: thermal trip points

On Thu, Aug 02, 2007 at 02:06:26PM +0200, Thomas Renninger wrote:
> On Thu, 2007-08-02 at 12:57 +0100, Matthew Garrett wrote:
> > On Thu, Aug 02, 2007 at 12:59:47PM +0100, Alan Cox wrote:
> > > Windows as I understand it has vendor mechanisms to allow the bits
> > > shipped with the OS to override/ignore just about everything trip points
> > > included. Lots of hardware that requires fixups in Linux and just works
> > > in Windows is not Linux bugs but Windows magic .inf files and other
> > > registry gunge done by the machine vendor. We see this in ATA, in power
> > > management and elsewhere.
> > 
> > I've seen no evidence that this happens with thermal trip points.
> 
> WMI needed for fan control -- FSC Amilo M3438G
> http://bugzilla.kernel.org/show_bug.cgi?id=5670

That machine has no active thermal trip points, so I'm not sure how it's 
relevant here. By the sounds of the bug log, I suspect Linux just runs 
slightly hotter on the machine than Windows does - especially since the 
user isn't running the closed nvidia driver, so there's nothing to carry 
out any power management on the GPU.
-- 
Matthew Garrett | mjg59@...f.ucam.org
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