From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Vine Subject: ACPI processor module with Atom N270 causes DMA errors Date: Sun, 25 Oct 2009 21:07:54 +0000 Message-ID: <20091025210754.55abdbe6@boulder.homenet> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: Received: from smtp6.freeserve.com ([193.252.22.191]:17264 "EHLO smtp6.freeserve.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753759AbZJYVZo (ORCPT ); Sun, 25 Oct 2009 17:25:44 -0400 Received: from smtp6.freeserve.com (mwinf3609 [10.232.31.37]) by mwinf3610.me.freeserve.com (SMTP Server) with ESMTP id EDDB81C006ED for ; Sun, 25 Oct 2009 22:10:02 +0100 (CET) Received: from me-wanadoo.net (localhost [127.0.0.1]) by mwinf3609.me.freeserve.com (SMTP Server) with ESMTP id 885E31C00081 for ; Sun, 25 Oct 2009 22:09:29 +0100 (CET) Received: from me-wanadoo.net (localhost [127.0.0.1]) by mwinf3609.me.freeserve.com (SMTP Server) with ESMTP id 7C2D11C00085 for ; Sun, 25 Oct 2009 22:09:29 +0100 (CET) Received: from boulder.homenet (unknown [91.104.2.139]) by mwinf3609.me.freeserve.com (SMTP Server) with ESMTP id 43EDA1C00081 for ; Sun, 25 Oct 2009 22:09:29 +0100 (CET) Received: from boulder.homenet (IDENT:1000@localhost [127.0.0.1]) by boulder.homenet (8.14.3/8.14.3) with ESMTP id n9PL7sZA005081 for ; Sun, 25 Oct 2009 21:07:54 GMT Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: linux-acpi@vger.kernel.org Hi, I have a Levono S-12 netbook which uses an Atom N270 processor. Loading the ACPI 'processor' module clobbers my DMA, specifically when using the b43 driver for a Broadcom BCM4312 802.11b/g [14e4:4315] low power phy wireless device. The b43 driver works correctly if the processor ACPI module is blacklisted. This is with kernel 2.6.32-rc5, but the same occurs with earlier pre-2.6.32 kernels. Please let me know what further information would be helpful (for example, the output of dmesg, lspci or lsmod, or other hardware information). Chris