From owner-freebsd-questions@FreeBSD.ORG Wed Sep 4 16:14:38 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 1E16F648 for ; Wed, 4 Sep 2013 16:14:38 +0000 (UTC) (envelope-from ewh2048@g.rit.edu) Received: from sc3app27.rit.edu (sc3app27.rit.edu [129.21.35.56]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id DEA8B2F14 for ; Wed, 4 Sep 2013 16:14:37 +0000 (UTC) Received: from mail-qc0-f175.google.com (mail-qc0-f175.google.com [209.85.216.175]) by smtp-server.rit.edu (PMDF V6.3-x14 #31420) with ESMTPS id <0MSL00FJTZSB3I@smtp-server.rit.edu> for freebsd-questions@freebsd.org; Wed, 04 Sep 2013 12:14:36 -0400 (EDT) Received: by mail-qc0-f175.google.com with SMTP id v2so285280qcr.6 for ; Wed, 04 Sep 2013 09:14:35 -0700 (PDT) Received: by 10.49.59.37 with HTTP; Wed, 04 Sep 2013 09:14:35 -0700 (PDT) X-Received: by 10.224.63.72 with SMTP id a8mr4268678qai.72.1378311275398; Wed, 04 Sep 2013 09:14:35 -0700 (PDT) X-Received: by 10.224.63.72 with SMTP id a8mr4268669qai.72.1378311275306; Wed, 04 Sep 2013 09:14:35 -0700 (PDT) Date: Wed, 04 Sep 2013 09:14:35 -0700 From: "Ethan W. House" Subject: Re: Intel graphics card brightness control issue In-reply-to: <20130904103044.Horde.cIfa0FIz0Yk1WO9-khv0NQ1@d2ux.org> Sender: ewh2048@rit.edu To: Matthias Petermann Message-id: MIME-version: 1.0 X-RIT-Received-From: 209.85.216.175 X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:sender:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=Oq34ZmQfuXkEoRNUUhl0kOcxD/xP23uRBU8xw+3vfC4=; b=JquXEXXAys+rZ5onQW3R93MM4yhgtMxW+Z6m9FViR7+rsEHXhRfqIm5R4Ev8rCoKWu TImzKmcunXwZO7mzY+PuHxO1Kc0Hg7xL2tss6V9VLsRc6tJSwwcB8NXCQSJ096Au2ect GxuV47QDPtG3SDd+JB99ubH3hwcfwN4dOW6kJH1AlKwfO4CecKJkj2O8abb4VWgDLw/t 0YckcA28zlKxT06u3IlSW+mGBpmCyHu45OI9HMjopyhAcmx7FJCVF4bqxsJ/HF+dwg+7 GeogpGt2O6eT5kxG2JqDMpdFwWMjRqUXZXeh+M8Y83M2QT5ub3yUZ0I1YhfsIer4+91q eeMA== X-Gm-Message-State: ALoCoQmBEh01zzfDupg+ywppa/hnEFeGwfPjEMMxCkkjQtSDSguP2FevG4LvB4UXJ5TQwyW1NwKGa7p0qOtO/vGa+Aoh2VpmOyLKOU1gjan3r/s6dgLqhImGELfqHHRcesCwlnGT43PecFGP+b6mdob53tv2cvcynuOXJSbs0Fa11OApkqaseUY= X-Google-Sender-Auth: nV0x2Nash-XK1e_wk5L8udk1iA8 References: <20130904103044.Horde.cIfa0FIz0Yk1WO9-khv0NQ1@d2ux.org> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.14 Cc: freebsd-questions@freebsd.org 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: Wed, 04 Sep 2013 16:14:38 -0000 I get a "Unknown object type '0'" error. Which interestingly enough is very similar to the error I get when I use xbacklight "No outputs have backlight property". I have a Lenovo Thinkpad x230. I will start playing around with acpidump after work. Ethan House On Wed, Sep 4, 2013 at 1:30 AM, Matthias Petermann wrote: > Hi Ethan, > > Zitat von "Ethan W. House" : > > > What could be causing my brightness control to not work on my Intel >> graphics card. The acpi values change but no effect takes place. >> >> ehouse@derpy ~ $ sudo sysctl hw.acpi.video.lcd0.brightness=3D**50 >> hw.acpi.video.lcd0.brightness: 100 -> 50 >> ehouse@derpy ~ $ sudo sysctl hw.acpi.video.lcd0.active=3D1 >> hw.acpi.video.lcd0.active: 0 -> 0 >> >> I also have an issue were upon resume by machine reboots. I believe the >> two >> might be related but I am not sure. >> >> I found a couple of other email chains with similar issues but most of >> them >> have been inactive for more then a year. >> > > Which Laptop model do you have? This issue appears a bit familiar to me[1= ] > - I have the same on my Thinkpad. As a workaround you could try to change > the brightness by direct ACPI calls. > > Preparation: > > * install sysutils/acpi_call > * kldload acpi_call > > Change brightness: > > * acpi_call -p '\VBRU' (Brightness Up) > * acpi_call -p '\VBRD' (Brightness Down) > > It might be that these calls are specific to Thinkpads, not sure if they > work with others. You can try to find out with acpidump[1]. > > Kind regards, > Matthias > > [1] http://www.freebsd.org/cgi/**query-pr.cgi?pr=3Damd64/181357 > [2] http://www.freebsd.org/doc/en_**US.ISO8859-1/books/handbook/** > acpi-debug.html > -- > Matthias Petermann > Ihr Partner f=FCr anspruchsvolle IT-L=F6sungen > www.petermann-it.de - l=F6sungsorientiert, innovativ und erfolgreich > > ______________________________**_________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/**mailman/listinfo/freebsd-**questions > To unsubscribe, send any mail to "freebsd-questions-** > unsubscribe@freebsd.org "