From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andi Kleen Subject: Re: 2.6.35-rc3 regression: IBM Maia system is unbootable [ACPI related?] Date: Mon, 21 Jun 2010 18:18:17 +0200 Message-ID: <87pqzkqrzq.fsf@basil.nowhere.org> References: <1277136189.10998.63.camel@mulgrave.site> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from one.firstfloor.org ([213.235.205.2]:53725 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932091Ab0FUQSW (ORCPT ); Mon, 21 Jun 2010 12:18:22 -0400 In-Reply-To: <1277136189.10998.63.camel@mulgrave.site> (James Bottomley's message of "Mon, 21 Jun 2010 11:03:09 -0500") Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: James Bottomley Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org James Bottomley writes: > The system in question has a set of root bridges, with the CD rom (which > is seen) being on bus 0 and the SCSI controller, which doesn't show up > being on bus 1 (with several other things on busses > 1). > > The system uses ACPI to detect the multiple bridges, so it seems that > this failure in 2.6.35-rc3: > > ACPI: Core revision 20100428 > ACPI Error: Hardware did not enter ACPI mode (20100428/evxfevnt-103) > ACPI Warning: AcpiEnable failed (20100428/utxface-147) > ACPI: Unable to enable ACPI That probably causes all the other problems. Without ACPI enabled modern systems generally do not work. Just guessing, but maybe try to revert b430acbd7c4b919886fa7fd92eeb7a695f1940d3 That was the last change in this area. -Andi -- ak@linux.intel.com -- Speaking for myself only.