From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alex Romosan Subject: Re: no backlight on radeon after recent kernel "upgrade"s Date: Wed, 21 Feb 2007 14:18:13 -0800 Message-ID: <877iub9mu2.fsf@sycorax.lbl.gov> References: <20070219044616.GC25659@washoe.onerussian.com> <20070219000412.acad13de.akpm@linux-foundation.org> <1171876788.6046.3.camel@localhost.localdomain> Mime-Version: 1.0 Return-path: In-Reply-To: <1171876788.6046.3.camel@localhost.localdomain> (message from Richard Purdie on Mon, 19 Feb 2007 09:19:48 +0000) Sender: linux-kernel-owner@vger.kernel.org List-Id: Cc: Yaroslav Halchenko , Andrew Morton , linux-kernel@vger.kernel.org, linux-fbdev-devel@lists.sourceforge.net Richard Purdie writes: > 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) >> >> 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. 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. --alex-- -- | I believe the moment is at hand when, by a paranoiac and active | | advance of the mind, it will be possible (simultaneously with | | automatism and other passive states) to systematize confusion | | and thus to help to discredit completely the world of reality. |