Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763704AbZCXUdv (ORCPT ); Tue, 24 Mar 2009 16:33:51 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758352AbZCXUdm (ORCPT ); Tue, 24 Mar 2009 16:33:42 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:57867 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757427AbZCXUdl (ORCPT ); Tue, 24 Mar 2009 16:33:41 -0400 Date: Tue, 24 Mar 2009 21:32:59 +0100 From: Ingo Molnar To: Andrew Lutomirski , David Woodhouse , Jesse Barnes , Kyle McMartin , Fenghua Yu , Suresh Siddha , Yinghai Lu , David Woodhouse , Mark Gross Cc: LKML Subject: Re: 2.6.29: can't resume from suspend with DMAR (intel iommu) enabled Message-ID: <20090324203259.GC26930@elte.hu> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1155 Lines: 32 (Cc:s added) * Andrew Lutomirski wrote: > On vanilla 2.6.29 (on Ubuntu 8.10), on a Lenovo x200s, my system > is completely hosed on resume. It appears that even hard disk IO > didn't work (trying to do *anything* including getting a dmesg > trace just spewed sda io errors to the console). Hence no trace. > I did an alt-sysrq-b and the screen went blank and the machine > just started beeping at me. > > Resume works much better with intel_iommu=off. (I remember seeing > a patch go by that purported to fix resume with IOMMU enabled, but > it didn't work for me.) > > I'd be happy to try to make a better bug report if anyone has any > bright ideas. i have a Lenovo T500 that does not even boot with with DMAR enabled in the BIOS (it's default-off), i get this panic in early bootup: DMAR hardware is malfunctioning So i dont get to test suspend/resume ;-) Ingo -- 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/