From owner-freebsd-questions@FreeBSD.ORG  Wed May 20 13:11:39 2015
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTPS id 5DD5D147
 for <freebsd-questions@freebsd.org>; Wed, 20 May 2015 13:11:39 +0000 (UTC)
Received: from mail-ig0-x230.google.com (mail-ig0-x230.google.com
 [IPv6:2607:f8b0:4001:c05::230])
 (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits))
 (Client CN "smtp.gmail.com",
 Issuer "Google Internet Authority G2" (verified OK))
 by mx1.freebsd.org (Postfix) with ESMTPS id 2B2E716B0
 for <freebsd-questions@freebsd.org>; Wed, 20 May 2015 13:11:39 +0000 (UTC)
Received: by igbyr2 with SMTP id yr2so101879558igb.0
 for <freebsd-questions@freebsd.org>; Wed, 20 May 2015 06:11:38 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113;
 h=mime-version:from:date:message-id:subject:to:content-type;
 bh=NcMsBYdpBqLY0IG9pWV8eHkAvaPVi+w4u97j/NB07xo=;
 b=V6Daj1YnlAv4/BbKz7SVkNi3+Vzi2fC3WpoQ2QV1GqcVGB6LcrK/C52aOYXYY77wkF
 maAXPTbIGL8tVCJ7FBZVmBWWx6OhpeCPGqs5YH8ATIFoPLKcsZr16JWIwCp18vNsH5UM
 +sqmAZtFbxH1m8SYtAtmvPWmT//TBA+NE1j3zAqtDQc3SC84eiAQo55PBa96l5QwTuYx
 yKs+/17skk11R3ieVmwJSGtDrjFSIv5Js1hC5m87VJS40i15RsnWO1fdFrp/gVnifDi2
 0Nrx6sRC0pGhCqiSkcQ56JV3xeQ+p5NsNyBymOrX3+fi9G3Ztpe2/lICsGxDu/OMDrsC
 73DA==
X-Received: by 10.42.226.8 with SMTP id iu8mr45506936icb.17.1432127498667;
 Wed, 20 May 2015 06:11:38 -0700 (PDT)
MIME-Version: 1.0
Received: by 10.36.121.1 with HTTP; Wed, 20 May 2015 06:11:18 -0700 (PDT)
From: Avinash Sonawane <rootkea@gmail.com>
Date: Wed, 20 May 2015 18:41:18 +0530
Message-ID: <CAJ9BSW-w6YvA71zu=zV2e_r4Lg78tCPahCc2_6CBkEDdmairFw@mail.gmail.com>
Subject: Brightness control in FreeBSD 10.1-RELEASE
To: freebsd-questions@freebsd.org
Content-Type: text/plain; charset=UTF-8
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.20
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions/>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 20 May 2015 13:11:39 -0000

Hello!

# uname -a
FreeBSD titanic.rootkea.me 10.1-RELEASE FreeBSD 10.1-RELEASE #0
r274401: Tue Nov 11 21:02:49 UTC 2014
root@releng1.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC  amd64

My brightness control keys don't work. When I press "Decrease
brightness" key nothing happens whereas when I press "Increase
brightness" key the continuous string of . (dot) appears on the
application running in foreground.

I tried `kldload acpi_video` but then when I tried to decrease the
brightness at first nothing happened and the suddenly brightness
dropped to minimum. Then when I tried to increase the brightness to
normal by pressing "Increase brightness" key the system went to reboot
automatically.

So how do I control the brightness of my FreeBSD box?

-- 
Avinash Sonawane (RootKea)
PICT, Pune
http://rootkea.wordpress.com