From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762142AbXGOXiW (ORCPT ); Sun, 15 Jul 2007 19:38:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755249AbXGOXiP (ORCPT ); Sun, 15 Jul 2007 19:38:15 -0400 Received: from nigel.suspend2.net ([203.171.70.205]:53561 "EHLO nigel.suspend2.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755103AbXGOXiO (ORCPT ); Sun, 15 Jul 2007 19:38:14 -0400 From: Nigel Cunningham To: Alan Stern Subject: Re: Hibernation considerations Date: Mon, 16 Jul 2007 09:38:13 +1000 User-Agent: KMail/1.9.6 Cc: david@lang.hm, "Rafael J. Wysocki" , LKML , Andrew Morton , "Eric W. Biederman" , "Huang, Ying" , Jeremy Maitin-Shepard , Kyle Moffett , Pavel Machek , pm list , Al Boldi References: In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart1875635.pehxPaokTr"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <200707160938.16037.nigel@nigel.suspend2.net> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --nextPart1875635.pehxPaokTr Content-Type: text/plain; charset="cp 850" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Hi. On Monday 16 July 2007 09:15:47 Alan Stern wrote: > On Sun, 15 Jul 2007 david@lang.hm wrote: >=20 > > >> for a pure hibernate mode, you will be powering off the box after=20 saving > > >> the suspend image. why are there any special ACPI modes involved? > > > > > > Because, for example, on my machine the status of power supply (prese= nt > > > vs not present) is not updated correctly after the restore if ACPI=20 callbacks > > > aren't used during the hibernation. That's just experience and it's = in=20 line > > > with the ACPI spec. > >=20 > > so if a machine is actually powered off the /dev/suspend process won't= =20 > > work? > >=20 > > remember that the system may run a different OS between the hibernate a= nd=20 > > the resume, makeing any assumptions about what state the hardware is in= =20 > > when you start the resume is a problem. >=20 > As I understand it, running a different OS between the hibernate and=20 > the resume would violate the ACPI spec. Well then, I know one or two people who would argue that the ACPI spec is=20 faulty. :\ Regards, Nigel =2D-=20 Nigel Cunningham Christian Reformed Church of Cobden 103 Curdie Street, Cobden 3266, Victoria, Australia Ph. +61 3 5595 1185 / +61 417 100 574 Communal Worship: 11 am Sunday. --nextPart1875635.pehxPaokTr Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQBGmq/oN0y+n1M3mo0RAgmVAJ9jz67HS+WaZ2TxiNeDbSVbmcsxawCfSOip zSF7Cboect+TZCUIRWDPHnE= =H0PZ -----END PGP SIGNATURE----- --nextPart1875635.pehxPaokTr--