Re: [PATCH] i8k: increase fan limit to 3

Flavio Leitner
2014-05-22T12:33:22Z

On Wed, May 21, 2014 at 10:36:45PM -0700, Guenter Roeck wrote:
> On 05/21/2014 08:45 PM, Flavio Leitner wrote:
> >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@sysclose.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.
> >
> I don't think there are any fans running at 78k rpm. The real speed
> is 78,510 / 30 or 2,617 rpm. You should set the fan_mult module
> parameter to 1 for your system.

Sure. I will do that. I didn't want to change anything else besides
the speed level and that is what sensors reports by default.

> >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.
> >
> Did you try to set higher values ?

Up to 4 which did nothing that I could notice.
No difference regarding to noise or temp or rpm.

fbl