From mboxrd@z Thu Jan 1 00:00:00 1970 From: Aaron Lu Subject: Re: [PATCH] ACPI: Disable Windows 8 compatibility for some Lenovo ThinkPads Date: Mon, 22 Apr 2013 21:40:00 +0800 Message-ID: <51753DB0.9010703@intel.com> References: <1360599681-24781-1-git-send-email-seth.forshee@canonical.com> <9174410.cA7eiWOPcn@vostro.rjw.lan> <5175055F.9000600@intel.com> <1587525.URWXxEIA21@vostro.rjw.lan> <517528E5.7030105@intel.com> <20130422130600.GA31365@thinkpad-t410> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-da0-f45.google.com ([209.85.210.45]:64017 "EHLO mail-da0-f45.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751771Ab3DVNkU (ORCPT ); Mon, 22 Apr 2013 09:40:20 -0400 Received: by mail-da0-f45.google.com with SMTP id v40so3141433dad.4 for ; Mon, 22 Apr 2013 06:40:20 -0700 (PDT) In-Reply-To: <20130422130600.GA31365@thinkpad-t410> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Seth Forshee Cc: "Rafael J. Wysocki" , Ben Jencks , Len Brown , linux-acpi@vger.kernel.org, joeyli , Matthew Garrett On 04/22/2013 09:06 PM, Seth Forshee wrote: > On Mon, Apr 22, 2013 at 08:11:17PM +0800, Aaron Lu wrote: >> On 04/22/2013 07:51 PM, Rafael J. Wysocki wrote: >>> I suppose we need to blacklist them to start with. I wouldn't like to apply >>> any general changes before we know how many different systems are affected by >>> this particular issue. >> >> I totally agree. > > Are you sure that all of these machines have an alternate interface for > userspace to change the brightness? I know that I've got a non-Lenovo > machine with nVidia graphics for which nouveau exposes no backlight What's the problem with this system then? The same as the thinkpads in bug 51231? -Aaron > control, and I have no idea what controls are exposed by the proprietary > graphics drivers. > > Seth