From mboxrd@z Thu Jan 1 00:00:00 1970 From: Richard Purdie Subject: Re: no backlight on radeon after recent kernel "upgrade"s Date: Wed, 21 Feb 2007 22:41:57 +0000 Message-ID: <1172097718.5790.29.camel@localhost.localdomain> References: <20070219044616.GC25659@washoe.onerussian.com> <20070219000412.acad13de.akpm@linux-foundation.org> <1171876788.6046.3.camel@localhost.localdomain> <877iub9mu2.fsf@sycorax.lbl.gov> Reply-To: linux-fbdev-devel@lists.sourceforge.net Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.92] helo=mail.sourceforge.net) by sc8-sf-list1-new.sourceforge.net with esmtp (Exim 4.43) id 1HK0AJ-0005KH-Fp for linux-fbdev-devel@lists.sourceforge.net; Wed, 21 Feb 2007 14:42:23 -0800 Received: from tim.rpsys.net ([194.106.48.114] ident=0) by mail.sourceforge.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.44) id 1HK0AG-0000M4-KI for linux-fbdev-devel@lists.sourceforge.net; Wed, 21 Feb 2007 14:42:22 -0800 In-Reply-To: <877iub9mu2.fsf@sycorax.lbl.gov> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-fbdev-devel-bounces@lists.sourceforge.net Errors-To: linux-fbdev-devel-bounces@lists.sourceforge.net To: Alex Romosan Cc: James Simmons , Yaroslav Halchenko , linux-fbdev-devel@lists.sourceforge.net, Andrew Morton , linux-kernel@vger.kernel.org On Wed, 2007-02-21 at 14:18 -0800, Alex Romosan wrote: > Richard Purdie writes: > i have exactly the same problem with 2.6.21-rc1 on a thinkpad t40 > with an ati radeon card. the machine boots up but the backlight never > comes on. 2.6.20 worked okay. Can you have a look at the differences between the defconfigs for 2.6.20 and 2.6.21-rc1? If the backlight changes are at fault, I'm guessing James' Kconfig changes to the video Kconfig would be the culprit since FB_RADEON_BACKLIGHT only used to be selectable if PMAC_BACKLIGHT was enabled. On a thinkpad, the backlight is probably under ACPI control. If FB_RADEON_BACKLIGHT wasn't set for 2.6.20, can you try 2.6.21-rc1 with that option disabled? An ls /sys/class/backlight under 2.6.20 will tell us which driver it was using... Thanks, Richard ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV