From mboxrd@z Thu Jan 1 00:00:00 1970 From: Robert Hancock Subject: Re: Samsung R560 ACPI issues Date: Wed, 31 Dec 2008 01:34:04 -0600 Message-ID: <495B206C.4020009@shaw.ca> References: <20081210134125.243910@gmx.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from main.gmane.org ([80.91.229.2]:45087 "EHLO ciao.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754902AbYLaHeQ (ORCPT ); Wed, 31 Dec 2008 02:34:16 -0500 Received: from list by ciao.gmane.org with local (Exim 4.43) id 1LHvan-0005pQ-2y for linux-acpi@vger.kernel.org; Wed, 31 Dec 2008 07:34:13 +0000 Received: from s0106000c41bb86e1.ss.shawcable.net ([70.76.47.20]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 31 Dec 2008 07:34:13 +0000 Received: from hancockr by s0106000c41bb86e1.ss.shawcable.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 31 Dec 2008 07:34:13 +0000 In-Reply-To: <20081210134125.243910@gmx.net> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: linux-acpi@vger.kernel.org Torsten Schlabach wrote: > Dear list! > > There seem to be some problems with P8400 based laptops and ACPI when using 64 Bit kernels. > > See for example: > > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/272530 > > I have such a laptop. What can I do to help find and possibly fix the problem? > > Regards, > Torsten Would be useful to narrow down what causes the problem.. It's reported that either mem=4096M or acpi=off is required. It would be useful to build a kernel that has some of the ACPI features (CPU frequency scaling, etc.) disabled and see if you can find out which part is causing the problem. This does smell quite possibly like some kind of BIOS or platform bug, though. Obviously Vista 32-bit works, but who knows about 64-bit..