From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755745AbaEVMdW (ORCPT ); Thu, 22 May 2014 08:33:22 -0400 Received: from mx1.redhat.com ([209.132.183.28]:33375 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754614AbaEVMdU (ORCPT ); Thu, 22 May 2014 08:33:20 -0400 Date: Thu, 22 May 2014 09:33:12 -0300 From: Flavio Leitner To: Guenter Roeck Cc: linux-kernel@vger.kernel.org, Arnd Bergmann , Flavio Leitner Subject: Re: [PATCH] i8k: increase fan limit to 3 Message-ID: <20140522123252.GF12759@t520.home> References: <1400725168-21358-1-git-send-email-fbl@redhat.com> <537D6FC8.5000105@roeck-us.net> <20140522034530.GD12759@t520.home> <537D8CED.4000603@roeck-us.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <537D8CED.4000603@roeck-us.net> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 > >>> > >>>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