From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Garrett Subject: Re: [PATCH] acpi-video: Add disable_native_backlight quirk for Dell XPS15 L521X Date: Mon, 12 Jan 2015 02:44:11 +0000 Message-ID: <20150112024411.GA6831@srcf.ucam.org> References: <1420444624-8313-1-git-send-email-hdegoede@redhat.com> <20150111061602.GA1677@srcf.ucam.org> <54B25280.6010604@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from cavan.codon.org.uk ([93.93.128.6]:48007 "EHLO cavan.codon.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751057AbbALCoQ (ORCPT ); Sun, 11 Jan 2015 21:44:16 -0500 Content-Disposition: inline In-Reply-To: <54B25280.6010604@redhat.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Hans de Goede Cc: "Rafael J. Wysocki" , linux-acpi@vger.kernel.org On Sun, Jan 11, 2015 at 11:37:52AM +0100, Hans de Goede wrote: > Userspace is writing to the intel_backlight device because it is the > only one present under /sys/class/backlight, as we disable acpi-video > on win8 ready laptops by default now. Why is nouveau not providing a backlight device? > The commit message may not be 100% accurate, although I believe this is > related to the laptop having nvidia graphics, but the code / fix is correct > regardless. I don't think we have enough evidence to know whether this fix is correct. -- Matthew Garrett | mjg59@srcf.ucam.org