From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Rafael J. Wysocki" Subject: Re: linux-next 20160512 - ACPI issue with screen brightness Date: Tue, 17 May 2016 22:50:11 +0200 Message-ID: References: <4736.1463510462@turing-police.cc.vt.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Return-path: Received: from mail-wm0-f44.google.com ([74.125.82.44]:34106 "EHLO mail-wm0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751382AbcEQUuN (ORCPT ); Tue, 17 May 2016 16:50:13 -0400 In-Reply-To: <4736.1463510462@turing-police.cc.vt.edu> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Valdis Kletnieks Cc: Aaron Lu , "Rafael J. Wysocki" , Linux Kernel Mailing List , ACPI Devel Maling List , Len Brown On Tue, May 17, 2016 at 8:41 PM, Valdis Kletnieks wrote: > next-20160512 sets the screen brightness to about 40%-ish or so, rather > than the 100% intensity I want. > > Dell Latitude E6530 laptop. > > git bisect tells me: > > 059500940defe285222d3b189b366dfe7f299cae is the first bad commit > commit 059500940defe285222d3b189b366dfe7f299cae > Author: Aaron Lu > Date: Wed Apr 27 20:45:04 2016 +0800 > > ACPI/video: export acpi_video_get_levels > > The acpi_video_get_levels is useful for other drivers, i.e. the > to-be-added int3406 thermal driver, so export it. > > Signed-off-by: Aaron Lu > Signed-off-by: Rafael J. Wysocki > > :040000 040000 24f4f5abe8beda2fa219dee7549faacc2f63e29f dfbe3a3bb4f58d82d5be768263d91172276fed98 M drivers > :040000 040000 603ffbf36e76717fe4f4ecb0418c9dbc59c76e25 a559bcd81c949a6471ffd045866df9b4e3fa4406 M include > > > but I've stared at the code and don't see what would do this.... Please try to check out the acpi-video branch from linux-pm.git and see if the problem is present then. If it is, please revert all of the top-most commits up to and including the above one and see if the problem goes away.