From owner-freebsd-questions@freebsd.org Wed Jan 29 09:14:30 2020 Return-Path: Delivered-To: freebsd-questions@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 657491D01A9 for ; Wed, 29 Jan 2020 09:14:30 +0000 (UTC) (envelope-from markand@malikania.fr) Received: from smtp.smtpout.orange.fr (smtp01.smtpout.orange.fr [80.12.242.123]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client CN "Bizanga Labs SMTP Client Certificate", Issuer "Bizanga Labs CA" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 486yVF1Pjpz4LB8 for ; Wed, 29 Jan 2020 09:14:28 +0000 (UTC) (envelope-from markand@malikania.fr) Received: from postfix.malikania.fr ([5.135.187.121]) by mwinf5d01 with ME id w9ES210062dbEiD039ESRq; Wed, 29 Jan 2020 10:14:26 +0100 X-ME-Helo: postfix.malikania.fr X-ME-Auth: ZGVtZWxpZXIuZGF2aWRAb3JhbmdlLmZy X-ME-Date: Wed, 29 Jan 2020 10:14:26 +0100 X-ME-IP: 5.135.187.121 Received: from [167.3.108.158] (unknown [77.159.242.250]) by postfix.malikania.fr (Postfix) with ESMTPSA id 2A2D715266 for ; Wed, 29 Jan 2020 10:14:25 +0100 (CET) To: freebsd-questions@freebsd.org From: David Demelier Subject: Changing hw.acpi.video.lcd0.brightness does nothing Message-ID: Date: Wed, 29 Jan 2020 10:14:24 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.4.2 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: fr Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 486yVF1Pjpz4LB8 X-Spamd-Bar: +++ Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=none (mx1.freebsd.org: domain of markand@malikania.fr has no SPF policy when checking 80.12.242.123) smtp.mailfrom=markand@malikania.fr X-Spamd-Result: default: False [3.73 / 15.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-questions@freebsd.org]; TO_DN_NONE(0.00)[]; AUTH_NA(1.00)[]; RCPT_COUNT_ONE(0.00)[1]; RCVD_COUNT_THREE(0.00)[3]; RCVD_TLS_LAST(0.00)[]; NEURAL_SPAM_MEDIUM(0.84)[0.841,0]; NEURAL_SPAM_LONG(0.98)[0.976,0]; RCVD_IN_DNSWL_NONE(0.00)[123.242.12.80.list.dnswl.org : 127.0.5.0]; R_SPF_NA(0.00)[]; DMARC_NA(0.00)[malikania.fr]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:3215, ipnet:80.12.240.0/20, country:FR]; MID_RHS_MATCH_FROM(0.00)[]; IP_SCORE(1.01)[ip: (1.76), ipnet: 80.12.240.0/20(1.57), asn: 3215(1.71), country: FR(0.00)]; RWL_MAILSPIKE_POSSIBLE(0.00)[123.242.12.80.rep.mailspike.net : 127.0.0.17] X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 29 Jan 2020 09:14:30 -0000 Hello, I have a thinkpad x1 carbon 4th gen. I wanted to give FreeBSD 12 a try and installed it in a USB hard drive. The module acpi_video(4) is loaded and nodes under hw.acpi.video are shown. However, changing values in hw.acpi.video.lcd0.brightness does nothing. It is correctly set but the screen brightness stays the same. Even tried values like 2, 98, etc. # sysctl hw.acpi.video.lcd0.brightness=2 # sysctl hw.acpi.video.lcd0.brightness=95 No change, it worked fine on my HP ProBook (which was more surprising since HP is not ACPI-compliant in many places). What's strange is the value hw.acpi.video.lcd0.active, it is 0 and trying to change to 1 is impossible. Any ideas? -- David