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 1S8cL3-0003RD-4s for garchives@archives.gentoo.org; Fri, 16 Mar 2012 18:57:21 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 0F64AE0C6E; Fri, 16 Mar 2012 18:57:03 +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 1CE16E0C02 for ; Fri, 16 Mar 2012 18:55:57 +0000 (UTC) Received: by eekb47 with SMTP id b47so2493392eek.40 for ; Fri, 16 Mar 2012 11:55:57 -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=Db9N8zLQ5ZSOZMX7NthvqdubdqGRQ6LI3+boNg5U+LU=; b=gNmt2KHB/nOI/o5J7BLjGNeMN1ZPf8Kt8N8c807hQlH2WSb8diPsscgl9HZZHp3GVB 3+e3Ob67NauD6EuMR2+79V/gl/QTcC68GZK3GpsCQtZzRUfe4442bKvOpKKA/CMVSKFh LjmIU56lTligHm5iM7KVUZEBFn4lA3cEUWp1VF8JHReentqpjNJ6rwOML7lpoW5u665C 2GXU6FugdNP9RazyaYsG8xQryybvBZU7k0FTVnjCnewtMlSaxl/B3AtmdTGtQPQ369N7 l4Q+quD9Fr/kOfBnsEeb49nVyngceCcQhr2FxYbYB5pyL/wKKDkJIQYwqiuve/6y2BDk jsWQ== 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 d3mr246234eba.55.1331924157035; Fri, 16 Mar 2012 11:55:57 -0700 (PDT) Received: by 10.213.8.78 with HTTP; Fri, 16 Mar 2012 11:55:56 -0700 (PDT) In-Reply-To: References: Date: Fri, 16 Mar 2012 11:55:56 -0700 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: fe0555c6-3aab-482c-a795-6de695f19eb9 X-Archives-Hash: add920d7ef276f256afbda0dcf5a80bc >>>> On my just-released Dell XPS 13 Ultrabook, I can control the backlight >>>> with 'xbacklight -set 0' and 'xbacklight -set 100'. =A0Any other value= s >>>> cause the screen to blink and flash. =A0The keyboard backlight shortcu= ts >>>> don't work unless I map them to xbacklight 0 and 100. =A0Also xbacklig= ht >>>> 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 runn= ing >>> such a CD then listing the loaded kernel modules might give you a clue. >> >> I tried the latest Kubuntu and Ubuntu LiveCDs via unetbootin but the >> backlight behavior is the same as with Gentoo. =A0Please let me know if >> anyone has any ideas on this. >> >> - Grant >> > > Grant, > =A0 Sorry I missed this thread earlier. I've got an Asus 17" laptop > that I've been trying unsuccessfully to get the keyboard backlighting > to work correctly for weeks (maybe months - I no longer remember how > long) On my machine I get keyboard backlighting when I boot the > machine, but if I turn off the lights with the switch on the machine I > cannot so far turn them back on by any means. > > =A0 On this machine xbacklight -get responds that nothing has backlight > properties so I've clearly got some configuration issues. > > =A0 As for the kernel I'm using vanilla-sources-3.2.10 so I don't think > there's a lot that is newer than that. > > =A0 I don't care much about screen backlighting but keyboard > backlighting is important to me. > > - Mark Hey Mark, I'm happy to say I just fixed the screen backlighting on my system, but I'm sorry to say I don't think it will help you with keyboard backlighting. To fix it, I removed 'acpi_backlight=3Dvendor' from grub and added 'echo 0 > /sys/class/backlight/intel_backlight/brightness' to /etc/local.d/backlight.start and made that file executable. Now backlight control works perfectly via the keyboard shortcuts with no other configuration and no xbacklight. I'm on hardened-sources-3.2.2-r1. BTW, I noticed baselayout1.start and baselayout1.stop are no longer created in /etc/local.d. - Grant