Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753875AbaJMM0i (ORCPT ); Mon, 13 Oct 2014 08:26:38 -0400 Received: from mail-oi0-f51.google.com ([209.85.218.51]:38700 "EHLO mail-oi0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753741AbaJMM0g (ORCPT ); Mon, 13 Oct 2014 08:26:36 -0400 Date: Mon, 13 Oct 2014 07:26:32 -0500 From: Chuck Ebbert To: Udo van den Heuvel Cc: Peter Hurley , "linux-kernel@vger.kernel.org" Subject: Re: CRASH during boot 3.16.3+ Message-ID: <20141013072632.07b8fa64@as> In-Reply-To: <543BA610.8010001@xs4all.nl> References: <543A88E4.4060707@xs4all.nl> <543ABD7D.5010308@hurleysoftware.com> <543BA610.8010001@xs4all.nl> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 13 Oct 2014 12:14:40 +0200 Udo van den Heuvel wrote: > On 2014-10-12 19:42, Peter Hurley wrote: > > On 10/12/2014 09:57 AM, Udo van den Heuvel wrote: > >> The problem: > >> During the first few seconds of bootup the kernel gets into some sort of > >> loop and rapidly prints loads of register-like things and then a load of > >> rubbish. > >> I did `make clean` and then a rebuild etc but this did not help. > >> > >> How can I capture the logging to find the point where things go wrong? > >> How can I find out what is wrong? > > > > Start with git bisect between good=3.16.2 and bad=3.16.3. > > And dmesg from 3.16.2. > > Incomplete dmesg attached for 3.16.2. > > > What happens after the 'then a load of rubbish.'? > > I press reset as this is unexpected and looks like it will not result in > a succesfull boot. > > > And rubbish is not > very descriptive. Please include a sample, if you can't catch all the > console prints. > > How can I capture the output easily? Add "boot_delay=3000" to the kernel command line. This will add a 3 second delay between each line. Then take pictures of the screen while it boots. And try to time the shots so you take them during the delays. -- 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/