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: Mon, 19 Feb 2007 09:19:48 +0000 Message-ID: <1171876788.6046.3.camel@localhost.localdomain> References: <20070219044616.GC25659@washoe.onerussian.com> <20070219000412.acad13de.akpm@linux-foundation.org> 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-mx1-b.sourceforge.net ([10.3.1.91] helo=mail.sourceforge.net) by sc8-sf-list1-new.sourceforge.net with esmtp (Exim 4.43) id 1HJ4gr-00038j-3F for linux-fbdev-devel@lists.sourceforge.net; Mon, 19 Feb 2007 01:20:09 -0800 Received: from tim.rpsys.net ([194.106.48.114] ident=0) by mail.sourceforge.net with esmtp (Exim 4.44) id 1HJ4gl-0000kk-Aq for linux-fbdev-devel@lists.sourceforge.net; Mon, 19 Feb 2007 01:20:06 -0800 In-Reply-To: <20070219000412.acad13de.akpm@linux-foundation.org> 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: Yaroslav Halchenko , Andrew Morton Cc: linux-fbdev-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org On Mon, 2007-02-19 at 00:04 -0800, Andrew Morton wrote: > On Sun, 18 Feb 2007 23:46:16 -0500 Yaroslav Halchenko wrote: > > Since the most recent successful for me kernel 2.6.19-rc6-mm1, I've > > tried few times to build more recent snapshots and now finally > > 2.6.20-mm2. In all those cases I have a sad outcome -- kernel boots but > > at some point during boot (few moments after Penguin icon in the top left > > corner appears), light turns off... I still can see something, especially > > if I light a strong flashlight at a sharp angle. > > > > I've enabled back-light support and lcd support for those unsuccessful > > kernels (with all backlight support features disabled kernel boots > > ok and backlight shines as bright as always) > > > > All my changes of values for files under > > /sys/class/backlight/radeonbl0 > > had no impact on the screen. Also I had no files under /sys/class/lcd. > > > > Running > > radeontool light off > > caused complete turning off of LCD - I could not see > > anything anymore. > > > > sony's spictl -b had no effect as well. > > > > Config can be found at > > http://www.onerussian.com/Linux/bugs/nobacklight.1/config-2.6.20-mm2 > > lshw > > http://www.onerussian.com/Linux/bugs/nobacklight.1/lshw > > other details are available from > > http://www.onerussian.com/Linux/bugs/nobacklight.1/ > > > > Could you please advise? > > (cc's added) > > Is 2.6.20 broken? I assume the latest 2.6.20-gitN snapshot are failing.. It would be extremely useful to know which kernel versions you tested and which ones failed. There are a number of backlight changes which are just in 2.6.20-mm1 and -mm2 which it would be useful to rule out or identify as the cause. Also, do you normally see files under /sys/class/lcd? Regards, 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