From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764123AbXGUMAD (ORCPT ); Sat, 21 Jul 2007 08:00:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1761877AbXGUL7z (ORCPT ); Sat, 21 Jul 2007 07:59:55 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:58755 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758492AbXGUL7y (ORCPT ); Sat, 21 Jul 2007 07:59:54 -0400 Date: Sat, 21 Jul 2007 13:59:48 +0200 From: Ingo Molnar To: Mark Tiefenbruck Cc: linux-kernel@vger.kernel.org Subject: Re: PROBLEM: Dell Inspiron 1501 fails to boot in 2.6.21+ Message-ID: <20070721115948.GA29178@elte.hu> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.14 (2007-02-12) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.0 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.0.3 -1.0 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org * Mark Tiefenbruck wrote: > IO window: disabled. > MEM window: c0200000-c02fffff > PREFETCH window: disabled. > PCI: Bridge: 0000:00:14.4 > IO window: disabled. > MEM window: c0300000-c03fffff > PREFETCH window: disabled. > PCI: Setting latency timer of device 0000:00:05.0 to 64 > PCI: Setting latency timer of device 0000:00:06.0 to 64 > NET: Registered protocol family 2 > > The next few lines are usually as follows, but recent kernels never > get to them: thanks for the detailed report and bisection test! The above hang strongly implicates some sort of high-res timers, dynticks or clocksource problem. Most likely timer interrupts do not come as expected, and the above place is one of the first spots where the kernel waits for a (short) timeout - so you see it hang indefinitely. Besides the options Thomas suggested, you could also try clocksource=pm_timer? Ingo