From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Christensen Subject: Re: [Aspire V5-431] Brightness control visible but does nothing Date: Fri, 17 Jan 2014 09:13:41 +0700 Message-ID: <20140117021341.GA22022@3bb.co.th> References: <52D60057.2050505@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mail-pb0-f48.google.com ([209.85.160.48]:44170 "EHLO mail-pb0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751713AbaAQCNr (ORCPT ); Thu, 16 Jan 2014 21:13:47 -0500 Received: by mail-pb0-f48.google.com with SMTP id rr13so3453250pbb.7 for ; Thu, 16 Jan 2014 18:13:46 -0800 (PST) Received: from thomasc-Aspire-V5-431 ([183.89.70.8]) by mx.google.com with ESMTPSA id nw11sm24700077pab.13.2014.01.16.18.13.44 for (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 16 Jan 2014 18:13:45 -0800 (PST) Content-Disposition: inline In-Reply-To: <52D60057.2050505@intel.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: linux-acpi@vger.kernel.org On Wed, Jan 15, 2014 at 11:28:23AM +0800, Aaron Lu wrote: > On 01/14/2014 06:02 PM, Thomas Christensen wrote: > > This laptop gets a /sys/class/backlight/acpi_video0 entry for > > backlight that is not working. > > > > $ ls /sys/class/backlight > > acpi_video0 intel_backlight > > > > and I see the following entry in the kernel log: > > > > [ 19.515016] acer_wmi: Brightness must be controlled by acpi video driver > > > > By using 'acpi_backlight=vendor' my desktop starts to work. > > Please file a bug to kernel bugzilla: > https://bugzilla.kernel.org/ > Choose ACPI/Power-Video, and attach your acpidump there. opened as https://bugzilla.kernel.org/show_bug.cgi?id=68751 let me know if I can be of further assistance. Thanks, Thomas