From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751577AbaEVFg6 (ORCPT ); Thu, 22 May 2014 01:36:58 -0400 Received: from mail.active-venture.com ([67.228.131.205]:52070 "EHLO mail.active-venture.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750741AbaEVFg5 (ORCPT ); Thu, 22 May 2014 01:36:57 -0400 X-Originating-IP: 108.223.40.66 Message-ID: <537D8CED.4000603@roeck-us.net> Date: Wed, 21 May 2014 22:36:45 -0700 From: Guenter Roeck User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0 MIME-Version: 1.0 To: Flavio Leitner CC: linux-kernel@vger.kernel.org, Arnd Bergmann , Flavio Leitner Subject: Re: [PATCH] i8k: increase fan limit to 3 References: <1400725168-21358-1-git-send-email-fbl@redhat.com> <537D6FC8.5000105@roeck-us.net> <20140522034530.GD12759@t520.home> In-Reply-To: <20140522034530.GD12759@t520.home> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. > 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 ? Guenter