From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750829AbXCULHR (ORCPT ); Wed, 21 Mar 2007 07:07:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751366AbXCULHR (ORCPT ); Wed, 21 Mar 2007 07:07:17 -0400 Received: from www.osadl.org ([213.239.205.134]:51448 "EHLO mail.tglx.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750829AbXCULHQ (ORCPT ); Wed, 21 Mar 2007 07:07:16 -0400 Subject: Re: BUG lapic: Can't boot on battery (2.6.21-rc{1,2,3,4}) From: Thomas Gleixner Reply-To: tglx@linutronix.de To: Andi Kleen Cc: Grzegorz Chwesewicz , Stefan Prechtel , linux-kernel@vger.kernel.org, mingo@elte.hu, Len Brown , john stultz In-Reply-To: <200703211137.10884.ak@suse.de> References: <200703211046.20724.ak@suse.de> <1174471808.10840.28.camel@localhost.localdomain> <200703211137.10884.ak@suse.de> Content-Type: text/plain Date: Wed, 21 Mar 2007 12:14:26 +0100 Message-Id: <1174475666.10840.44.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.6.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2007-03-21 at 11:37 +0100, Andi Kleen wrote: > > The BIOS/ACPI is broken and does only expose C1, which should not switch > > off LAPIC. The BIOS is switching into deeper C-States behind the kernels > > back somehow. > > Hmm, perhaps we can check AMD && (cstate >= 2 || has a battery) ? > Should be doable by looking up the battery object in ACPI Which makes us rely on another ACPI feature. What guarantees that the ACPI tables are correct for this one ? tglx