From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751880Ab3ATLTZ (ORCPT ); Sun, 20 Jan 2013 06:19:25 -0500 Received: from 8bytes.org ([85.214.48.195]:40949 "EHLO mail.8bytes.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751358Ab3ATLTY (ORCPT ); Sun, 20 Jan 2013 06:19:24 -0500 Date: Sun, 20 Jan 2013 12:19:20 +0100 From: =?iso-8859-1?Q?J=F6rg_R=F6del?= To: Udo van den Heuvel Cc: Borislav Petkov , linux-kernel@vger.kernel.org Subject: Re: 3.6.11 AMD-Vi: Completion-Wait loop timed out Message-ID: <20130120111920.GL25591@8bytes.org> References: <50FBC7EF.6040207@xs4all.nl> <20130120103652.GB16800@pd.tnic> <50FBC994.8020409@xs4all.nl> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <50FBC994.8020409@xs4all.nl> User-Agent: Mutt/1.5.21 (2010-09-15) X-DSPAM-Result: Whitelisted X-DSPAM-Processed: Sun Jan 20 12:19:20 2013 X-DSPAM-Confidence: 0.9976 X-DSPAM-Probability: 0.0000 X-DSPAM-Signature: 50fbd2b822971665154718 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Jan 20, 2013 at 11:40:20AM +0100, Udo van den Heuvel wrote: > Hello, > > On 2013-01-20 11:36, Borislav Petkov wrote: > > I know just the guy, CCed. :-) > > Thanks for the quick response! > I found this similar case: > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1073384 Yes, this is a Hardware issue for which the BIOS does not apply the workaround. The only solution for now is to disable the IOMMU on the Trinity based chips. Unfortunatly I don't have access to the hardware any longer to write a workaround in the AMD IOMMU driver. The question is what to do now, I tend to disable the IOMMU if a Trinity chip is detected. This is not the first report of this problem I encountered. Regards, Joerg