Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752714Ab0FWRw2 (ORCPT ); Wed, 23 Jun 2010 13:52:28 -0400 Received: from old-tantale.fifi.org ([64.81.30.200]:35826 "EHLO old-tantale.fifi.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751506Ab0FWRw1 (ORCPT ); Wed, 23 Jun 2010 13:52:27 -0400 X-Greylist: delayed 567 seconds by postgrey-1.27 at vger.kernel.org; Wed, 23 Jun 2010 13:52:27 EDT To: Ben Guthro Cc: linux-kernel@vger.kernel.org Subject: Re: i915: Dell E6410 Ironlake LVDS detection References: Mail-Copies-To: nobody From: Philippe Troin Date: 23 Jun 2010 10:42:55 -0700 In-Reply-To: Message-ID: <87bpb1fxwg.fsf@old-tantale.fifi.org> User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.2 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1694 Lines: 38 Ben Guthro writes: > I have a problematic machine, that I have traced the problem down to > what I think is an issue with the i915 detection of the LVDS on the > Ironlake chip. > > The machine in question is a Dell Latitude E6410 - i5 quad core > laptop, with the intel Ironlake chip, and the failure condition is > such that when the boot sequence switches into KMS mode, the screen > goes black, and never comes back. I am seeing similar problems with an HP Elitebook 2540p. > My base install is Ubuntu 10.04, and I've spun through a few kernels > to try to bisect the problem. Unfortunately, I've been unable to find > a kernel that works (including the 2.6.35 RC's, and an ubuntu build of > drm-intel-next from the beginning of June) 2.6.32 works for me. 2.6.33.5 does not. I'm currently bisecting the issue, but I do it at a rate of one kernel a day, so I will need a few more days. > I can get the machine to come up on an external display, if switched > at the BIOS screen...but /sys/class/card0 never shows an LVDS > connector...and dmesg doesn't seem to be throwing any errors. I'm not sure if this hardware has a LVDS connector. I was able to boot it with i915 loaded (-> black screen), ssh in and run xrandr. Xrandr reported 6 connectors, none of them named LVDS. It think they were named FP[123]. I was able to turn on an external display connected via VGA with xrandr and it seemed to be working fine? Phil. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/