Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755365AbXHGGql (ORCPT ); Tue, 7 Aug 2007 02:46:41 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752820AbXHGGqb (ORCPT ); Tue, 7 Aug 2007 02:46:31 -0400 Received: from rv-out-0910.google.com ([209.85.198.189]:65298 "EHLO rv-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751336AbXHGGq3 (ORCPT ); Tue, 7 Aug 2007 02:46:29 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:user-agent:mime-version:to:cc:subject:references:in-reply-to:x-enigmail-version:content-type:content-transfer-encoding; b=XXouSAij2GiWKCj5bTDUdJYfmat6oYBzdTmGNDgaSdVcSmjSj2Fmmjy5pkgZg31TE7nOD8vRwnLaqlIzqd47/EajWxz9AUvJ8RZTDobAlHLGmuGpvCvjmPXtqAwLO1gnAU/hNfvfbm1Rr8htZsfbvmL+tFruNeQ5CgVQBRY0Fno= Message-ID: <46B8140E.3000509@gmail.com> Date: Tue, 07 Aug 2007 15:41:18 +0900 From: Tejun Heo User-Agent: Icedove 1.5.0.10 (X11/20070307) MIME-Version: 1.0 To: Robert Hancock CC: Michael Sedkowski , "Rafael J. Wysocki" , Henrique de Moraes Holschuh , linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org, linux-acpi@vger.kernel.org, Thomas Renninger Subject: Re: Disk spin down issue on shut down/suspend to disk References: <46B7AF53.1040307@shaw.ca> In-Reply-To: <46B7AF53.1040307@shaw.ca> X-Enigmail-Version: 0.94.2.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1690 Lines: 39 Robert Hancock wrote: > Tejun Heo wrote: >> Michael Sedkowski wrote: >>>> Hmmm... If the problem only shows up on nx6325, it might be that >>>> ACPI is >>>> pulling unnecessary stunt. Please apply the attached patch and report >>>> when the disk spins down and up. >>> Disk spins down on "Pre-shutdown prepare" and then goes up and down on >>> "Power down". >> >> Oh... crap, so acpi wants to sync cache on shutdown. I wonder whether >> it spins down the disk correctly. Does emergency unload count increase >> after each power down? Also, please post the result of 'dmidecode'. > > I know that my Compaq X1000-series laptop does do some kind of ACPI > games with the disk on ACPI power off (I assume it is putting the disk > in standby before power-off at least). It also does this if you boot > into DOS, GRUB, etc. and then hit the power button. Could be if the disk > is dumb enough to spin up for sync cache and standby when there is > nothing to flush, and the kernel does its own standby, this could cause > an extra spinup/down.. Yeah, that seems to be what's going on. I don't think we have any other choice than blacklisting those notebooks. This is a mess. How does the other OS cope with this? I'm thinking about using DMI vendor/product match to detect the affected systems but I think it would be better to match the ACPI implementation directly. Is there a way to match specific ACPI implementation? Thanks. -- tejun - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/