Re: High cpu temperature with 2.6.32, bisection shows commit 69d258(fwd)

From: Arjan van de Ven
Date: Sat Jan 09 2010 - 19:40:21 EST

On Sun, 10 Jan 2010 02:32:11 +0200 (EET)
Dimitrios Apostolou <jimis@xxxxxxx> wrote:

> On Sat, 9 Jan 2010, Arjan van de Ven wrote:
> > On Sun, 10 Jan 2010 01:55:42 +0200 (EET)
> > Dimitrios Apostolou <jimis@xxxxxxx> wrote:
> >
> >> L8400B series Notebook PC
> >
> > can you try this patch?
> >
> OK I'm compiling a new kernel right now but that will take a while, I
> only have access to old hardware at the moment... What exactly this
> patch does?

basically it appears that your machine, when the kernel asks for C2,
exits C2 immediately again.

The old algorithm somehow caught this and stopped asking for C2 most of
the time; the new algorithm doesn't see any activity and asks for C2

What the patch does is tell the kernel to just not use C2 at all...

Arjan van de Ven Intel Open Source Technology Centre
For development, discussion and tips for power savings,
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at