From mboxrd@z Thu Jan 1 00:00:00 1970 From: Julian Wollrath Subject: Re: [Regression]: Changing brightness does not work with v3.16-rc4 Date: Sat, 12 Jul 2014 18:24:52 +0200 Message-ID: <20140712182452.19ef6a91@saldaea> References: <20140712180636.698e2e4c@saldaea> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: Received: from mout.web.de ([212.227.17.12]:61502 "EHLO mout.web.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751255AbaGLQY7 (ORCPT ); Sat, 12 Jul 2014 12:24:59 -0400 Received: from saldaea ([84.134.38.250]) by smtp.web.de (mrweb102) with ESMTPSA (Nemesis) id 0MgO8g-1WuPEc0Jrq-00NeHs for ; Sat, 12 Jul 2014 18:24:56 +0200 In-Reply-To: <20140712180636.698e2e4c@saldaea> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: linux-acpi@vger.kernel.org Hi, > changing the brightness on my Thinkpad X230 with Intel HD4000 > graphics, stopped working after commit 886129a8eebe (ACPI / video: > change acpi-video brightness_switch_enabled default to 0). Changing > it back to 1, fixes the problem, if "acpi_osi=!Windows 2012" is also > set. Before that commit just setting "acpi_osi=!Windows 2012" was > enough to get changing the brightness working. small correction: It setting "acpi_osi=!Windows 2012" does only help when using a kernel with commit 886129a8eebe as HEAD, with v3.16-rc4 setting video.brightness_switch_enabled=1 and acpi_osi=!Windows 2012 or just one of them, does not make changing the brightness work again. > > > With best regards, > Julian Wollrath