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 1S4MXK-0008BW-49 for garchives@archives.gentoo.org; Mon, 05 Mar 2012 01:16:28 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 0FB79E09A4; Mon, 5 Mar 2012 01:16:13 +0000 (UTC) Received: from mail-ee0-f53.google.com (mail-ee0-f53.google.com [74.125.83.53]) by pigeon.gentoo.org (Postfix) with ESMTP id BFA7AE0805 for ; Mon, 5 Mar 2012 01:14:43 +0000 (UTC) Received: by eekb47 with SMTP id b47so1334397eek.40 for ; Sun, 04 Mar 2012 17:14:42 -0800 (PST) Received-SPF: pass (google.com: domain of emailgrant@gmail.com designates 10.213.13.195 as permitted sender) client-ip=10.213.13.195; Authentication-Results: mr.google.com; spf=pass (google.com: domain of emailgrant@gmail.com designates 10.213.13.195 as permitted sender) smtp.mail=emailgrant@gmail.com; dkim=pass header.i=emailgrant@gmail.com Received: from mr.google.com ([10.213.13.195]) by 10.213.13.195 with SMTP id d3mr438213eba.55.1330910082926 (num_hops = 1); Sun, 04 Mar 2012 17:14:42 -0800 (PST) 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=xtxJtBzUMG292MFfRaUsXx1OTtj/T870h8ReYjqwAvo=; b=kvFtqMeUawoJVljiuGQXep8DAOqtUPOAsKXefiaA7udDiznbKdgFnOvbKub3UGeaG4 jI7h2qU3WAu8Kw2CIb1V6tY0yD31T77wk6js6ftdP6dv1trG+yVx9subXEKs92HQklc2 pQs0NbNW4cip8CKr3kkKrEAPJgMraBjDE7oxleJe21FinFcmVv75R7kTCiQa5xPiNSO1 Y2dtxf7TR4az3xAGr7v1WmFgM+DQYwKlAEKI8UtZjjnTcayWvjeZkP3o4BiuOhV53phk Z+DNBQjX2OX/s9+ttXRtAWXj2RClW5XX1Big8nIpk/3UMYhisz+e9+jiK5boEUMUcldD r7DA== 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 10.213.13.195 with SMTP id d3mr313643eba.55.1330910082841; Sun, 04 Mar 2012 17:14:42 -0800 (PST) Received: by 10.213.113.148 with HTTP; Sun, 4 Mar 2012 17:14:42 -0800 (PST) In-Reply-To: References: Date: Sun, 4 Mar 2012 17:14:42 -0800 Message-ID: Subject: Re: [gentoo-user] Re: Backlight problems From: Grant To: gentoo-user@lists.gentoo.org Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Archives-Salt: b0dc46d4-a85d-4c11-9806-30cba892ef7b X-Archives-Hash: cf49652bbfbaf184fd3ae3e7c3f5482e >> On my just-released Dell XPS 13 Ultrabook, I can control the backlight >> with 'xbacklight -set 0' and 'xbacklight -set 100'. =A0Any other values >> cause the screen to blink and flash. =A0The keyboard backlight shortcuts >> don't work unless I map them to xbacklight 0 and 100. =A0Also xbacklight >> doesn't work at all if I'm unplugged from AC. =A0I've tried >> acpi_osi=3DLinux and acpi_backlight=3Dvendor in grub.conf. =A0acpi_osi >> doesn't seem to make any difference and xbacklight doesn't work at all >> without acpi_backlight. =A0Do I just need to wait for a newer kernel? > > Does the gentoo install CD or a rescue CD give you any way to test the > same backlight functions? =A0If the backlight works correctly when runnin= g > such a CD then listing the loaded kernel modules might give you a clue. That's a fine idea. The latest Gentoo minimal CD wouldn't boot this laptop so I used Kubuntu to install and I should do something like that for testing the backlight. Is there a consensus on which LiveCD is kept really up-to-date and works well across a lot of different hardware? - Grant