Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752057AbZKSMAT (ORCPT ); Thu, 19 Nov 2009 07:00:19 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751126AbZKSMAS (ORCPT ); Thu, 19 Nov 2009 07:00:18 -0500 Received: from tac.ki.iif.hu ([193.6.222.43]:38592 "EHLO tac.ki.iif.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750715AbZKSMAR (ORCPT ); Thu, 19 Nov 2009 07:00:17 -0500 From: Ferenc Wagner To: "Rafael J. Wysocki" Cc: linux-pm@lists.linux-foundation.org, Jesse Barnes , Andrew Morton , yakui.zhao@intel.com, LKML , ACPI Devel Maling List , Len Brown Subject: Re: [linux-pm] intermittent suspend problem again References: <87fx93pwv2.fsf@tac.ki.iif.hu> <200911141952.50030.rjw@sisk.pl> <87r5rwrkqs.fsf@tac.ki.iif.hu> <200911182313.14092.rjw@sisk.pl> Date: Thu, 19 Nov 2009 13:00:00 +0100 In-Reply-To: Ferenc Wagner's message of "Wed\, 18 Nov 2009 23\:55\:01 +0100" Message-ID: <877htmragv.fsf@tac.ki.iif.hu> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1399 Lines: 39 Ferenc Wagner writes: > "Rafael J. Wysocki" writes: > >> On Wednesday 18 November 2009, Ferenc Wagner wrote: >> >>> Ferenc Wagner writes: >>> >>> Side question: If I run s2disk from the init=/bin/bash prompt, the >>> instrumentation in acpi_enter_sleep_state_prep in drivers/acpi/acpica/hwsleep.c >>> fires before the "Snapshotting system" phase, but it does not fire if I >>> hibernate from the full running desktop. (That instrumentation was put >>> there to investigate the KMS-triggered STR freeze.) What could explain >>> this? >> >> It looks like it uses the "shutdown" method when run with init=/bin/bash, but >> I don't know why exactly. > > Thanks for the tip, I'll check this too. While looking into this, I found a reproducible kernel panic: 1. boot with init=/bin/bash 2. mount /usr; swapon -a 3. plug in a USB pendrive 4. s2disk (machine goes to sleep) 5. power on, proceed with resuming, press Enter to cancel resume pause 6. ACPI: Hardware changed while hibernated, cannot resume! Kernel panic - not syncing: ACPI S4 hardware signature mismatch Does it make sense? -- Thanks, Feri. -- 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/