Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751056Ab3IZHtI (ORCPT ); Thu, 26 Sep 2013 03:49:08 -0400 Received: from mail-oa0-f49.google.com ([209.85.219.49]:38954 "EHLO mail-oa0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750888Ab3IZHtD convert rfc822-to-8bit (ORCPT ); Thu, 26 Sep 2013 03:49:03 -0400 MIME-Version: 1.0 In-Reply-To: <87eh8clvun.fsf@intel.com> References: <1380016052-15315-1-git-send-email-aaron.lu@intel.com> <1380026575.3371.1.camel@ThinkPad-X230.localdomain> <20130925091720.GA1921@aaronlu.sh.intel.com> <87vc1p4207.fsf@intel.com> <87eh8clvun.fsf@intel.com> Date: Thu, 26 Sep 2013 09:49:03 +0200 Message-ID: Subject: Re: [PATCH v3 0/4] Fix Win8 backlight issue From: =?UTF-8?Q?J=C3=B6rg_Otte?= To: Jani Nikula Cc: Aaron Lu , Igor Gnatenko , ACPI Devel Maling List , intel-gfx , dri-devel@lists.freedesktop.org, Linux Kernel Mailing List , Daniel Vetter , "Rafael J. Wysocki" , Matthew Garrett , Seth Forshee , Lee Chun-Yi , Richard Purdie , Yves-Alexis Perez , Felipe Contreras , Henrique de Moraes Holschuh , Ben Jencks , Steven Newbury , James Hogan , Kamal Mostafa , Joerg Platte , Kalle Valo , Martin Steigerwald , Mike Galbraith Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2462 Lines: 63 2013/9/25 Jani Nikula : > On Wed, 25 Sep 2013, Jörg Otte wrote: >> 2013/9/25 Jani Nikula : >>> On Wed, 25 Sep 2013, Aaron Lu wrote: >>>> On Wed, Sep 25, 2013 at 10:29:37AM +0200, Jörg Otte wrote: >>>>> Backlight can't be modified with this patch set - neither with >>>>> function keys nor with the gui. It is a step backward to v3.11-rc1 >>> >>> So both hotkeys and GUI work in v3.11-rc1? And v3.12-rc2? >> >> In v3.11-rc1 it didn't work. >> Since a later rc (I don't remember exactly which) it did work. >> In v3.12-rc1/2 it does work. >> In v3.12-rc2 + Aaron's patch set it again doesn't work. >> >>> >>>> Thanks for the test. >>>> >>>> Please check /sys/class/backlight, is there only one link file >>>> intel_backlight? >>> >>> Indeed, are there others? fujitsu-laptop perhaps? If yes, try >>> CONFIG_FUJITSU_LAPTOP=n or an appropriate module blacklist. >>> >>> Just checking, you do have CONFIG_BACKLIGHT_CLASS_DEVICE=y? >> >> There is only one intel_backlight link. >> Yes, I have CONFIG_BACKLIGHT_CLASS_DEVICE=y >> >>> Embarrassingly there was a bug in i915 fixed just recently where the >>> backlight device wasn't registered for >>> CONFIG_BACKLIGHT_CLASS_DEVICE=m... >>> >>>> If so, please cd inside and try modify the brightness file using echo >>>> with some values in the range of 0 - max_brightness, does the >>>> backlight level change when you echo a new value? I guess it doesn't, >>>> or you wouldn't notice problem. If indeed so, perhaps file a bug at >>>> http://bugzilla.kernel.org, Drivers/Video(DRI-Intel)? I suppose Jani >>>> and Daniel can help fix your problem. >>> >>> Yup, please check the above, and report back. >> >> - echo 0..max_brightness > brightness does not work. > > Thanks for the info. > > How about v3.12-rc2 without Aaron's patches? Does intel_backlight also > not work there? How about the acpi_video0 (which I presume is present) > sysfs interface? > Without Aaron's patches intel_backlight also does not work. But acpi_video0 does (and takes precedence I think). >>>>> Video driver: i915 >>>>> FUJITSU LIFEBOOK AH532/FJNBB1C, BIOS Version 1.09 05/22/2012 >> >> Jörg -- 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/