From owner-freebsd-questions@FreeBSD.ORG Sat Sep 28 12:37:03 2013 Return-Path: Delivered-To: FreeBSD-questions@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id 0061763A for ; Sat, 28 Sep 2013 12:37:02 +0000 (UTC) (envelope-from ooomka@yandex.ru) Received: from forward3h.mail.yandex.net (forward3h.mail.yandex.net [IPv6:2a02:6b8:0:f05::3]) by mx1.freebsd.org (Postfix) with ESMTP id A19EC29E4 for ; Sat, 28 Sep 2013 12:37:01 +0000 (UTC) Received: from smtp2h.mail.yandex.net (smtp2h.mail.yandex.net [84.201.187.145]) by forward3h.mail.yandex.net (Yandex) with ESMTP id DAD7013610DF for ; Sat, 28 Sep 2013 16:36:58 +0400 (MSK) Received: from smtp2h.mail.yandex.net (localhost [127.0.0.1]) by smtp2h.mail.yandex.net (Yandex) with ESMTP id AB0EF1701D33 for ; Sat, 28 Sep 2013 16:36:58 +0400 (MSK) Received: from unknown (unknown [188.191.233.117]) by smtp2h.mail.yandex.net (nwsmtp/Yandex) with ESMTP id FhtzXoVKPx-awiWu0o5; Sat, 28 Sep 2013 16:36:58 +0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex.ru; s=mail; t=1380371818; bh=ZjO2BrfkU98JdiOIoTGD7cJ+RvWfQfcr6xPRhWLQ4Ao=; h=Message-ID:Date:From:User-Agent:MIME-Version:To:Subject: Content-Type; b=ZIA1UWIhVRmEDFZiu8wZI8qdcPF+C4EcvC2OO9QmdHVF8cn8VwCzMI7PnNfql+Tgo /LgVlt0HFP8EXvyW1AzsIQzMC4rnm1afvqM6ht/6uaV9UXw3LlrDReZPpcdfh1jYgS nFhKaotSdeXWVTMv6OIRWZOPppbgNR365Q5FZf04= Authentication-Results: smtp2h.mail.yandex.net; dkim=pass header.i=@yandex.ru Message-ID: <5246CD48.9070605@yandex.ru> Date: Sat, 28 Sep 2013 15:36:24 +0300 From: Sergiy Mikhailushko User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:24.0) Gecko/20100101 Thunderbird/24.0 MIME-Version: 1.0 To: FreeBSD-questions@FreeBSD.org Subject: ASUS U46E laptop brightness Content-Type: multipart/mixed; boundary="------------070201020405070309090704" X-Content-Filtered-By: Mailman/MimeDel 2.1.14 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 28 Sep 2013 12:37:03 -0000 This is a multi-part message in MIME format. --------------070201020405070309090704 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Hi all Could you please help me with a little annoying problem concerning laptop backlight? I've got ASUS U46E laptop running FreeBSD 9-STABLE amd64. The problem is that backlight is always set to maximum value. Pressing Fn+F5 (brightness down) has no effect, just yielding the following to /var/log/messages: ACPI Error: Result stack is empty! State=0xfffffe00017fa800 (20110527/dswstate-113) ACPI Exception: AE_AML_NO_RETURN_VALUE, Missing or null operand (20110527/dsutils-695) ACPI Exception: AE_AML_NO_RETURN_VALUE, While creating Arg 0 (20110527/dsutils-821) ACPI Error: Method parse/execution failed [\_SB_.PCI0.GFX0.GCBL] (Node 0xfffffe000181f600), AE_AML_NO_RETURN_VALUE (20110527/psparse-560) What I've tried: 1) Flashed the latest BIOS version from ASUS website (ver301) 2) Upgraded OS to the latest STABLE version (last upgrade Aug 30 2013) 3) Loading acpi_asus module: # kldload acpi_asus # sysctl -a | grep asus # 4) Loading acpi_video module: # sysctl hw.acpi.video.lcd0.active=1 hw.acpi.video.lcd0.active: 0 -> 0 # sysctl hw.acpi.video.lcd0.fullpower=60 hw.acpi.video.lcd0.fullpower: 100 -> 60 # sysctl hw.acpi.video.lcd0.economy=60 hw.acpi.video.lcd0.economy: 77 -> 60 # sysctl hw.acpi.video.lcd0.brightness=60 hw.acpi.video.lcd0.brightness: 60 -> 60 Values are changed but brightness doesn't 5) Using acpi_call utility (not sure what value should be changed, tried acpi_call -p '\_SB_.PCI0.GFX0.GCBL' and acpi_call -p '\_SB_.PCI0.LPCB.EC0_._Q0E' -- both resulting in Unknown object type '0') # uname -a FreeBSD toysrv 9.2-PRERELEASE FreeBSD 9.2-PRERELEASE #2 r255810: Fri Sep 27 14:27:49 EEST 2013 oomka@toysrv:/usr/obj/usr/src/sys/TOYSRV amd64 # acpidump -dt > u46e.asl [gzipped file attached] I used to run i386 FreeBSD on this laptop -- the brightness control was okay on it. There were often kernel panics on that architecture so I've switched to amd64. Panics disappeared and the things work fine so far, except the screen brightness. I know that my problem isn't critical when I'm working on daylight or with external LCD display, but when I have to work at the laptop at night -- this spotlight really drives me crazy. Thank you in advance for your help. --------------070201020405070309090704--