Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755764Ab0BHUky (ORCPT ); Mon, 8 Feb 2010 15:40:54 -0500 Received: from ogre.sisk.pl ([217.79.144.158]:59986 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755294Ab0BHUkw convert rfc822-to-8bit (ORCPT ); Mon, 8 Feb 2010 15:40:52 -0500 From: "Rafael J. Wysocki" To: =?utf-8?q?Rafa=C5=82_Mi=C5=82ecki?= Subject: Re: [Bug #15096] Resume lock up -- bisected, commit 3a1151e3f124fd1a2c54b8153f510f1a7c715369 Date: Mon, 8 Feb 2010 21:41:31 +0100 User-Agent: KMail/1.12.4 (Linux/2.6.33-rc7-rjw; KDE/4.3.5; x86_64; ; ) Cc: Linux Kernel Mailing List , Kernel Testers List , Maciej Rutecki , Len Brown , Stefan Bader , Zhang Rui , =?utf-8?q?J=C3=A9r=C3=B4me_Glisse?= References: <2uzMDuY-7_O.A.M1G.7X1bLB@chimera> <201002082024.32483.rjw@sisk.pl> In-Reply-To: MIME-Version: 1.0 Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: 8BIT Message-Id: <201002082141.31512.rjw@sisk.pl> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2376 Lines: 52 On Monday 08 February 2010, Rafał Miłecki wrote: > W dniu 8 lutego 2010 20:24 użytkownik Rafael J. Wysocki napisał: > > On Monday 08 February 2010, Rafał Miłecki wrote: > >> W dniu 8 lutego 2010 11:56 użytkownik Rafael J. Wysocki napisał: > >> > On Monday 08 February 2010, Rafał Miłecki wrote: > >> >> 2010/2/8 Rafael J. Wysocki : > >> >> > This message has been generated automatically as a part of a report > >> >> > of regressions introduced between 2.6.31 and 2.6.32. > >> >> > > >> >> > The following bug entry is on the current list of known regressions > >> >> > introduced between 2.6.31 and 2.6.32. Please verify if it still should > >> >> > be listed and let the tracking team know (either way). > >> >> > > >> >> > > >> >> > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=15096 > >> >> > Subject : Resume lock up -- bisected, commit 3a1151e3f124fd1a2c54b8153f510f1a7c715369 > >> >> > Submitter : Rafał Miłecki > >> >> > Date : 2010-01-20 23:15 (19 days old) > >> >> > First-Bad-Commit: http://git.kernel.org/git/linus/3a1151e3f124fd1a2c54b8153f510f1a7c715369 > >> > > >> > It looks like we should revert this commit, seems broken. > >> > > >> > Anyway, I'll do my best to have a look at this bug later today. > >> > >> In such case I'd prefer to add "broken_DOS" flag for devices that were > >> enabled by this patch. We could avoid restoring backlight on resume > >> for broken_DOS then and maybe just update brightness to current value. > > > > Or perhaps we can try to restore the backlight at a different place. > > I wanted to find out what causes this lock up by syncing modules > resume or putting some delays. See bug report of my question. > Unfortunately didn't get answer. Hmm. I think the Jérôme's comment at http://bugzilla.kernel.org/show_bug.cgi?id=15096#c19 is actually correct. It looks like acpi_video_resume() is executed before the KMS driver's resume and things go south. In fact, we seem to have a design issue with acpi_video_resume(), because it's called too early. Rafael -- 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/