linux-kernel - Re: [PATCH] i8k: increase fan limit to 3

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Message-ID: <20140522034530.GD12759@t520.home>
Date:	Thu, 22 May 2014 00:45:30 -0300
From:	Flavio Leitner <fbl@...hat.com>
To:	Guenter Roeck <linux@...ck-us.net>
Cc:	linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
	Flavio Leitner <fbl@...close.org>
Subject: Re: [PATCH] i8k: increase fan limit to 3

On Wed, May 21, 2014 at 08:32:24PM -0700, Guenter Roeck wrote:
> On 05/21/2014 07:19 PM, Flavio Leitner wrote:
> >From: Flavio Leitner <fbl@...close.org>
> >
> >It is possible to increase left fan speed on a
> >DELL Precision 490n system up to 3.
> >
> >     value    fan rpm
> >       1      35460
> >       2      64740
> >       3      78510
> >
> Guess the speed factor 30 doesn't apply here.

Those are actual rpms, not just a multiplied rpm. What I mean
is that you can hear the fan spinning up or down and the
temperature going up or down accordingly.

But even setting it to 3 is not enough to spin at maximum
speed. Anyway, now I can load the system without the FBDIMM
going above 75oC.

[...]
> I'll have to test this on older systems to make sure it doesn't cause problems there.

Sure, let me know your findings. In meanwhile, I am using the patch here.
Thanks,
fbl
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