linux-kernel - Re: [REGRESSION]fan turns at highspeed after suspend2ram

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Message-Id: <200802101955.38572.rjw@sisk.pl>
Date:	Sun, 10 Feb 2008 19:55:37 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	"Ray Lee" <ray.lee@...sys.com>
Cc:	"Mirco Tischler" <mt-ml@....de>,
	lkml <linux-kernel@...r.kernel.org>,
	"Len Brown" <len.brown@...el.com>, "Pavel Machek" <pavel@...e.cz>
Subject: Re: [REGRESSION]fan turns at highspeed after suspend2ram

On Sunday, 10 of February 2008, Ray Lee wrote:
> On Feb 10, 2008 9:21 AM, Mirco Tischler <mt-ml@....de> wrote:
> > Hi
> >
> > I think I found a regression in 2.6.24-git. After waking up from suspend
> > 2 ram, the fan of my laptop turns constantly at highest speed. It didn't
> > do this in 2.6.24.
> >
> > I bisected it down to this commit:
> >
> > commit c95d47a868f35cd47643d116a3c680cdaa954df8
> > Author: Rafael J. Wysocki <rjw@...k.pl>
> > Date:   Tue Jan 8 00:05:21 2008 +0100
> >
> >     ACPI: Separate invocations of _GTS and _BFS from _PTS and _WAK
> >
> > Reverting it resolves the problem for me, but I can't say if this makes
> > any sense.
> >
> > My machine is a Zepto laptop with Intel Santa-Rosa chipset and I'm
> > running a x86_64 Ubuntu Gutsy.
> 
> I just noticed the same problem. After about ten minutes, it seems
> like all the ACPI events got 'unstuck' -- my screen's backlight went
> up and down a couple of times (and battery/AC indicator flipped a
> couple of times) responding to previous power loss and gain events, I
> think, and the fans dropped down from high speed to low.
> 
> I was chalking it up to another charming bug on my HP nx6125, but if
> someone else is seeing it too...
> 
> I'm on Ubuntu, x86_64, and git as of a couple days ago as well. I
> haven't tried reverting the patch.

I've just sent a patch to Mirco, please test it too.

Thanks,
Rafael
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