From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932262AbVHRXDv (ORCPT ); Thu, 18 Aug 2005 19:03:51 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932365AbVHRXDv (ORCPT ); Thu, 18 Aug 2005 19:03:51 -0400 Received: from mail.suse.de ([195.135.220.2]:63659 "EHLO mx1.suse.de") by vger.kernel.org with ESMTP id S932361AbVHRXDu (ORCPT ); Thu, 18 Aug 2005 19:03:50 -0400 Date: Fri, 19 Aug 2005 01:03:49 +0200 From: Andi Kleen To: Sean Bruno Cc: Andi Kleen , linux-kernel@vger.kernel.org Subject: Re: 2.6.13-rc6-git10 test report [x86_64] Message-ID: <20050818230349.GC22993@wotan.suse.de> References: <1124401950.14825.13.camel@home-lap.suse.lists.linux.kernel> <1124405533.14825.24.camel@home-lap> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1124405533.14825.24.camel@home-lap> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Aug 18, 2005 at 03:52:13PM -0700, Sean Bruno wrote: > With earlier kernels(2.6.11) I was able to boot my machine with ACPI > enabled, but most devices(sound, onboard ethernet, SATA controllers, > USB) were unusuable but they were detected. I was able to work around > this issue by disabling ACPI in my system BIOS. Keeping it on and using pci=noacpi might be better. > available. Since 2.6.12, when I re-activate ACPI in my system BIOS, I > can't boot my machine as it gives me an error about no IOMMU and having > 6GB of RAM. This error was not listed in the dmesg posted before as I > can't boot my machine past this error. > > Here is the exact output when booting 2.6.13 with ACPI enabled: > > Decompressing Linux ... Done > Booting the kernel > PCI-DMA: More that 4GB of RAM and no IOMMU > PCI-DMA: 32bit PCI IO may malfunction.<6>PCI-DMA: Disabling IOMMU This has nothing to do with ACPI. The problem here is that you didn't enable the IOMMU code in the kernel .config -Andi