From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-in-10.arcor-online.net (mail-in-10.arcor-online.net [151.189.21.50]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mx.arcor.de", Issuer "Thawte Premium Server CA" (verified OK)) by ozlabs.org (Postfix) with ESMTP id 1E287DDF07 for ; Fri, 15 Jun 2007 10:19:03 +1000 (EST) In-Reply-To: <20070614164136.GB27602@iram.es> References: <200706141739.12754.mb@bu3sch.de> <20070614164136.GB27602@iram.es> Mime-Version: 1.0 (Apple Message framework v623) Content-Type: text/plain; charset=US-ASCII; format=flowed Message-Id: <6e243cf388c34c4dd3c54ffd04dfbd4f@kernel.crashing.org> From: Segher Boessenkool Subject: Re: Powerbook hard shutdown after boot if it's hot Date: Fri, 15 Jun 2007 02:18:52 +0200 To: Gabriel Paubert Cc: linuxppc-dev@ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , > I believe that the hardware (PMU?) forces a power off > when the fan speed control registers are not accessed > for some time. This delay may depend on the temperature. Yes, to me as well it sounds like the PMU is unhappy because you didn't talk to it for too long while things are hot. Pretty hard to prove this assumption of course -- but try Gabriel's suggestion, if that works, it means this diagnosis is at least slightly correct. A real fix is something different of course. > As a stab in the dark, you might try to force the fans at > full speed in an __init function. This will make the machine > noisy for some time before the loop starts regulating fan > speed but might buy you some time. Segher