From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mikel Olasagasti Subject: No DMA on a Dell Latitude D820 with >2.6.20 Date: Sun, 27 Jan 2008 17:12:00 +0100 Message-ID: <1201450320.8386.7.camel@localhost> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: Received: from xs2info.com ([82.144.4.27]:52034 "EHLO smtp.mundurat.net" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1751580AbYA0QRZ (ORCPT ); Sun, 27 Jan 2008 11:17:25 -0500 Received: from localhost (argala.mundurat.net [127.0.0.1]) by smtp.mundurat.net (Postfix) with ESMTP id 464C5B840CA for ; Sun, 27 Jan 2008 17:11:40 +0100 (CET) Received: from smtp.mundurat.net ([127.0.0.1]) by localhost (argala.mundurat.net [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 1SnFYmRr1P1g for ; Sun, 27 Jan 2008 17:11:33 +0100 (CET) Received: from [192.168.0.100] (215.Red-213-96-129.staticIP.rima-tde.net [213.96.129.215]) (using SSLv3 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.mundurat.net (Postfix) with ESMTP id E291EB840C9 for ; Sun, 27 Jan 2008 17:11:24 +0100 (CET) Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: linux-ide@vger.kernel.org Hi, I'm having problems with my disk on a Latitude D820 after upgrading kernel to any >2.6.20 No DMA support can be activated, giving me a very poor I/O performance. I'm using ata_piix driver on a ICH7 system with no AHCI support AFAIK I opened a thread[1] on gentoo-forums (the distro I use) with all the output i think can be interesting. Hope you can help me guys. Thanks for all :) [1] http://forums.gentoo.org/viewtopic-p-4731161.html -- Mikel Olasagasti