From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752277AbbIEQtU (ORCPT ); Sat, 5 Sep 2015 12:49:20 -0400 Received: from vs14.mail.saunalahti.fi ([62.142.117.201]:46578 "EHLO vs14.mail.saunalahti.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751086AbbIEQtO (ORCPT ); Sat, 5 Sep 2015 12:49:14 -0400 X-Greylist: delayed 399 seconds by postgrey-1.27 at vger.kernel.org; Sat, 05 Sep 2015 12:49:13 EDT To: linux-kernel@vger.kernel.org From: Joonas Saarinen Subject: Screen brightness adjustment is just too broken Message-ID: <55EB1B76.1070601@saunalahti.fi> Date: Sat, 5 Sep 2015 19:42:30 +0300 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi! To me it looks like the screen brightness adjustment is a bit messy in Linux. If I install Ubuntu or Linux Mint on any laptop, I usually get 2 brightness steps with one keypress (with some machines even 3). I believe this is because the brightness adjustment is handled by multiple listeners (for example, the ACPI interface, GPU driver and, internally by BIOS). Are there plans to eventually fix this behavior? Joonas Saarinen