From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pavel Machek Subject: Re: suspend slow in 2.6.25-rc6 (was Re: Suspend and hibernation patchset against -rc6) Date: Wed, 19 Mar 2008 00:05:38 +0100 Message-ID: <20080318230538.GA1686@elf.ucw.cz> References: <200803120129.25585.rjw@sisk.pl> <200803172317.33745.rjw@sisk.pl> <20080318130642.GA1609@elf.ucw.cz> <20080318130710.GB1609@elf.ucw.cz> <20080318225201.GA2115@elf.ucw.cz> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <20080318225201.GA2115@elf.ucw.cz> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-pm-bounces@lists.linux-foundation.org Errors-To: linux-pm-bounces@lists.linux-foundation.org To: Linus Torvalds Cc: LKML , ACPI Devel Maling List , pm list , Alexey Starikovskiy , Johannes Berg List-Id: linux-pm@vger.kernel.org Hi! > > should not take too long to check which commit it is. Even if it should > > take 9 reboots to bisect it entirely, going just five or six will likely > > narrow it down sufficiently that we can probably guess fairly well what > > it's about. > > Hmm, it gets weirder. 2.6.25-rc5 was fast, and had small problem with > backlight hotkeys did not work. > > 2.6.25-rc6 has backlight hotkeys somehow working, but closing/opening lid in X > kills the backlight, making machine unusable. > > Hmm... > > commit 7c0ea45be4f114d85ee35caeead8e1660699c46f > tree 0822ef23606a733e00bbf75d3e218b1e92abdd78 > parent 2f44bbb495dd3e6d0209eff2257438ab9c570e5b > author Zhao Yakui Tue, 11 Mar 2008 16:56:47 > +0800 > committer Len Brown Tue, 11 Mar 2008 22:20:19 > -0400 > > ACPI: Ignore _BQC object when registering backlight device > > According to acpi spec , the objects of _BCL and _BCM are > required if > integrated LCD is present and supports brightness level .The _BQC > is > the optional object. So the _BQC object is ignored when the > backlight device > is registered in ACPI video driver. > > http://bugzilla.kernel.org/show_bug.cgi?id=10206 > > Signed-off-by: Zhao Yakui > Signed-off-by: Zhang Rui > Signed-off-by: Len Brown > > > when did this go in? Pretty recently, right? And that means that ACPI > backlight driver is now used on machines where it was not used > before...? No, this commit was not responsible, but CONFIG_ACPI_VIDEO *is* responsible for the "X has no backlight after lid close/open". Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html pomozte zachranit klanovicky les: http://www.ujezdskystrom.info/