From mboxrd@z Thu Jan 1 00:00:00 1970 From: Martin Herkt Subject: Re: PROBLEM: [Asus Zenbook Pro UX501JW] Backlight control via hotkeys does not work Date: Mon, 01 Jun 2015 23:50:50 +0200 Message-ID: <3398135.BGeJMlpYrp@sakuya> References: Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7Bit Return-path: Received: from srsfckn.biz ([148.251.137.227]:40723 "EHLO srsfckn.biz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751628AbbFAVuw (ORCPT ); Mon, 1 Jun 2015 17:50:52 -0400 Received: from sakuya.localnet (dslb-088-068-164-236.088.068.pools.vodafone-ip.de [88.68.164.236]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by srsfckn.biz (Postfix) with ESMTPSA id 922311917612 for ; Mon, 1 Jun 2015 23:50:34 +0200 (CEST) In-Reply-To: Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: linux-input@vger.kernel.org On Monday 01 June 2015 23:19:09 Philip Tibom wrote: > [1.] One line summary of the problem: > [Asus Zenbook Pro UX501JW] Backlight control via hotkeys does not work > > > > [2.] Full description of the problem/report: > When using the default open source drivers, backlight control does not > work via keyboard hotkeys on Asus Zenbook Pro UX501JW. > > WORKAROUND: The backlight can be manually set while running on the > integrated intel graphics (not with hotkeys). Setting acpi_osi= on the kernel command line is a workaround for many ASUS laptops running UEFI firmware (I have one of those too). Although I did not observe any obvious unwanted side effects with this option, I have no idea which other ACPI functions are influenced by it. See also: https://bugzilla.kernel.org/show_bug.cgi?id=89401 https://bugzilla.kernel.org/show_bug.cgi?id=70241