Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762391AbZCXUD2 (ORCPT ); Tue, 24 Mar 2009 16:03:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760291AbZCXUDS (ORCPT ); Tue, 24 Mar 2009 16:03:18 -0400 Received: from ogre.sisk.pl ([217.79.144.158]:39033 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759214AbZCXUDR (ORCPT ); Tue, 24 Mar 2009 16:03:17 -0400 From: "Rafael J. Wysocki" To: Andrew Lutomirski Subject: Re: 2.6.29: can't resume from suspend with DMAR (intel iommu) enabled Date: Tue, 24 Mar 2009 21:03:00 +0100 User-Agent: KMail/1.11.1 (Linux/2.6.29-rc8-tst; KDE/4.2.1; x86_64; ; ) Cc: LKML , x86@vger.kernel.org, Ingo Molnar , iommu@lists.linux-foundation.org, FUJITA Tomonori References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-2" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200903242103.01109.rjw@sisk.pl> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 941 Lines: 22 Added some CCs. On Tuesday 24 March 2009, 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. > > --Andy -- 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/