From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030929AbXDYNuf (ORCPT ); Wed, 25 Apr 2007 09:50:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030996AbXDYNuf (ORCPT ); Wed, 25 Apr 2007 09:50:35 -0400 Received: from ag-out-0708.google.com ([72.14.246.248]:11873 "EHLO ag-out-0708.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030929AbXDYNud (ORCPT ); Wed, 25 Apr 2007 09:50:33 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:subject:from:to:cc:in-reply-to:references:content-type:date:message-id:mime-version:x-mailer:content-transfer-encoding; b=Nj0Ti2B+1dla7r9xYdJZgXARrM65+A8fjU6VlBaJiN21CK2IdskA3yEY0vLTpzUGe9XttQSBSocMb7HmgU2ytIBZ+67Ey4XRc8sNhBYhOS7FocoshTOhLAL9MmhpSiiIyW/4fZI7y7jkYV6rD3M9uhBMO43/zy47ErVepmXftig= Subject: Re: [3/3] 2.6.21-rc7: known regressions (v2) From: "Antonino A. Daplas" To: Dave Jones Cc: Adrian Bunk , Andrew Morton , Linus Torvalds , Linux Kernel Mailing List , pavel@suse.cz, linux-pm@lists.linux-foundation.org, "Eric W. Biederman" , "Rafael J. Wysocki" , James Simmons , gregkh@suse.de, linux-pci@atrey.karlin.mff.cuni.cz, Jeremy Fitzhardinge In-Reply-To: <20070425130102.GA10141@redhat.com> References: <20070423214909.GD3468@stusta.de> <20070425040605.6d6b4a82.akpm@linux-foundation.org> <20070425113102.GU3468@stusta.de> <20070425130102.GA10141@redhat.com> Content-Type: text/plain Date: Wed, 25 Apr 2007 21:50:14 +0800 Message-Id: <1177509014.29878.12.camel@daplas> Mime-Version: 1.0 X-Mailer: Evolution 2.8.2 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2007-04-25 at 09:01 -0400, Dave Jones wrote: > On Wed, Apr 25, 2007 at 01:31:02PM +0200, Adrian Bunk wrote: > > On Wed, Apr 25, 2007 at 04:06:05AM -0700, Andrew Morton wrote: > > > On Mon, 23 Apr 2007 23:49:09 +0200 Adrian Bunk wrote: > > >... > > > > Subject : ThinkPad X60: resume no longer works (PCI related?) > > > > workaround: CONFIG_FB_BACKLIGHT=n > > > > References : http://lkml.org/lkml/2007/3/13/3 > > > > Submitter : Dave Jones > > > > Caused-By : PCI merge > > > > commit 78149df6d565c36675463352d0bfe0000b02b7a7 > > > > Handled-By : Eric W. Biederman > > > > Rafael J. Wysocki > > > > Antonino A. Daplas > > > > Status : unknown > > > > > > Is this related to the problems Jeremy has been looking at? > > >... > > > > Dave and Jeremy hran into similar looking but most likely different > > problems. > > > > For Jeremy -rc7 is working fine, but for Dave it doesn't. > > I think this was due to Jeremy not having CONFIG_FB_BACKLIGHT=y in his config. This is really weird, as CONFIG_FB_BACKLIGHT just selects BACKLIGHT_CLASS and LCD_CLASS, and adds an entry (bl_curve) under /sys/class/backlight/*/. ACPI_IBM which is set (presumably) in Dave's kconfig, also selects the BACKLIGHT_CLASS. And the only possible framebuffer drivers in the thinkpad are vesafb and intelfb, none of which has a backlight driver. I'm still at a loss how this happens. Dave, can you post your config? And have you tried the following settings: FB_BACKLIGHT=y ACPI_IBM=n ACPI_VIDEO=n I'm also adding Richard Purdie to the CC list. Tony PS: I also get a blank display on resume with a Toshiba laptop. But cycling through the Fn keys brings it back. I don't know if this is a regression, I will have to try older kernels.