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 <yakui.zhao@xxxxxxxxx> Tue, 11 Mar 2008 16:56:47 > +0800 > committer Len Brown <len.brown@xxxxxxxxx> 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 <yakui.zhao@xxxxxxxxx> > Signed-off-by: Zhang Rui <rui.zhang@xxxxxxxxx> > Signed-off-by: Len Brown <len.brown@xxxxxxxxx> > > > 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/ _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
