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: Sun, 11 Jan 2015 06:16:02 +0000 Message-ID: <20150111061602.GA1677@srcf.ucam.org> References: <1420444624-8313-1-git-send-email-hdegoede@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]:41919 "EHLO cavan.codon.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750785AbbAKGQM (ORCPT ); Sun, 11 Jan 2015 01:16:12 -0500 Content-Disposition: inline In-Reply-To: <1420444624-8313-1-git-send-email-hdegoede@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 Mon, Jan 05, 2015 at 08:57:04AM +0100, Hans de Goede wrote: > The L521X variant of the Dell XPS15 has integrated nvidia graphics, and > backlight control does not work properly when using the native interfaces. I'm not convinced that the assessment of this bug is correct. Is the system using the nvidia graphics device? If so, why is userspace writing to the intel backlight device? -- Matthew Garrett | mjg59@srcf.ucam.org