From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1S8hHx-00054w-Lg for garchives@archives.gentoo.org; Sat, 17 Mar 2012 00:14:29 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id CD0ACE0C7C; Sat, 17 Mar 2012 00:14:15 +0000 (UTC) Received: from mail-ey0-f181.google.com (mail-ey0-f181.google.com [209.85.215.181]) by pigeon.gentoo.org (Postfix) with ESMTP id B9EABE0B38 for ; Sat, 17 Mar 2012 00:12:28 +0000 (UTC) Received: by eaa1 with SMTP id 1so2496264eaa.40 for ; Fri, 16 Mar 2012 17:12:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type:content-transfer-encoding; bh=ReYfm4dt2JdFxLhj7Drz5Rgtq2r33RZTygfjb9vL8yQ=; b=R9fsTLmmQzsDqLwY2JXwdbVdj4diW+cM66uRfqSaTkkLKmaCD+CUyA3ve7lJzssTuO KH5JbpvhXK7/4quztvZ2vr6PBr60aheYl106wxC8QEt2RcH46H7WXKrzo20k/yij+aCd kR1+kscIIdf/wj0lquBwLH+tKhaClZxObX4pMXI1xESXba67ESz5fv9KGAC2V8FD1JrZ BlzPZwvY4rTjP383rvGVUmQzs9ZS728z21dsyJQGISXfdP9DSsuvfUdLyXnidly1txaH iQOJJkWbIcdiPCXI71ZZW8m0ZQV/gXVfXPxr+WGvzngvkN1+6lZxNZzTWb4hMlb/oA5O Bqig== Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Received: by 10.213.31.78 with SMTP id x14mr272134ebc.247.1331943147970; Fri, 16 Mar 2012 17:12:27 -0700 (PDT) Received: by 10.213.8.78 with HTTP; Fri, 16 Mar 2012 17:12:27 -0700 (PDT) In-Reply-To: References: Date: Fri, 16 Mar 2012 17:12:27 -0700 Message-ID: Subject: Re: [gentoo-user] Where does /sys/class/backlight/intel_backlight come from? From: Grant To: gentoo-user@lists.gentoo.org Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Archives-Salt: 08cbfc23-2ce1-4309-b2f2-6f478c5a7889 X-Archives-Hash: cb417820cffe63e14e9325d0192ece6b >> Does anyone know which kernel option would be responsible for >> /sys/class/backlight/intel_backlight? =A0I've disabled some backlight >> stuff in the kernel but the directory still appears. =A0I get screen >> backlight control on my laptop if I do: >> >> echo 0 > /sys/class/backlight/intel_backlight/brightness >> >> but if xlockmore blanks my screen, I have to issue the above again >> before screen backlight control works again. =A0I also have acpi_video0 >> in /sys/class/backlight and I think removing intel_backlight might fix >> the problem. >> >> I could try deleting the directory. =A0Is that safe? =A0Are the files an= d >> folders in /sys generated dynamically at boot? > > The /sys directory is like /proc; it's a virtual directory which > serves as interface to several kernel knobs. I don't think you can > remove any dir from it, and if you do, next boot it will show up > again. You're right, "operation not permitted" there. - Grant