Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761867AbZCXUhB (ORCPT ); Tue, 24 Mar 2009 16:37:01 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757209AbZCXUgv (ORCPT ); Tue, 24 Mar 2009 16:36:51 -0400 Received: from mga11.intel.com ([192.55.52.93]:4780 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754568AbZCXUgv convert rfc822-to-8bit (ORCPT ); Tue, 24 Mar 2009 16:36:51 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.38,414,1233561600"; d="scan'208";a="441696423" From: "Yu, Fenghua" To: "'Ingo Molnar'" , "'Andrew Lutomirski'" , "'David Woodhouse'" , "'Jesse Barnes'" , "'Kyle McMartin'" , "Siddha, Suresh B" , "'Yinghai Lu'" , "Woodhouse, David" , "'Mark Gross'" CC: "'LKML'" Date: Tue, 24 Mar 2009 13:36:46 -0700 Subject: RE: 2.6.29: can't resume from suspend with DMAR (intel iommu) enabled Thread-Topic: 2.6.29: can't resume from suspend with DMAR (intel iommu) enabled Thread-Index: Acmsv8Ofw6Z65nMLTjCDDF7k9ruQGAAAFT3Q Message-ID: References: <20090324203259.GC26930@elte.hu> In-Reply-To: <20090324203259.GC26930@elte.hu> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1321 Lines: 36 > >(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 ;-) > Current kernel doesn't have iommu suspend/resume support yet. I'll send out suspend/resume patches today or tomorrow. Hope that will help. Thanks. -Fenghua -- 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/