From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jani Nikula Subject: Re: v3.14-rc7: Backlight control broken on Dell XPS13 Date: Mon, 17 Mar 2014 17:03:31 +0200 Message-ID: <87txawzx30.fsf@intel.com> References: <87eh213q70.fsf@kima.orebokech.com> <877g7s53ac.fsf@kima.orebokech.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTP id 241BF6F8B1 for ; Mon, 17 Mar 2014 08:07:18 -0700 (PDT) In-Reply-To: <877g7s53ac.fsf@kima.orebokech.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Romain Francoise , Daniel Vetter Cc: intel-gfx List-Id: intel-gfx@lists.freedesktop.org On Mon, 17 Mar 2014, Romain Francoise wrote: > Hi Daniel, > > Daniel Vetter writes: > >> Please never just send a mail to maintainers, always cc mailing lists. > > Yes, sorry, I sent this privately because it wasn't a fully-formed bug > report; I just wanted Jani to confirm that it wasn't intentionally > broken as of -rc7. > >> Have you tested with the patch reverted to confirm that it's indeed >> this commit and not something else (e.g. in the acpi code)? > > I hadn't, but I've now reverted the revert and things work again as in > v3.13. So as far as I can tell the quirk is still definitely needed. I still don't think having the quirk is the way to go. Let's fix this properly, shall we? Please file a new bug on DRM/Intel component at [1]. Please attach intel_reg_dumper output (tool from intel-gpu-tools [2]) with and without the revert. Please also attach dmesg with drm.debug=0xe from early boot. Do you have the snb or ivb model? BR, Jani. [1] https://bugs.freedesktop.org/enter_bug.cgi?product=DRI [2] http://cgit.freedesktop.org/xorg/app/intel-gpu-tools/ > > Thanks! > -r -- Jani Nikula, Intel Open Source Technology Center