From mboxrd@z Thu Jan 1 00:00:00 1970 From: Robert Hancock Subject: Re: PATA port not detected when using AHCI on Intel 82801GB/GR/GH Date: Fri, 05 Feb 2010 19:43:50 -0600 Message-ID: <4B6CC956.4080009@gmail.com> References: <4B6B7FAC.2010901@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-iw0-f185.google.com ([209.85.223.185]:62150 "EHLO mail-iw0-f185.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757478Ab0BFBnx (ORCPT ); Fri, 5 Feb 2010 20:43:53 -0500 Received: by iwn15 with SMTP id 15so1685296iwn.19 for ; Fri, 05 Feb 2010 17:43:52 -0800 (PST) In-Reply-To: <4B6B7FAC.2010901@gmail.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Joe Ceklosky Cc: linux-ide@vger.kernel.org On 02/04/2010 08:17 PM, Joe Ceklosky wrote: > What was the final outcome on this issue? > > What kernel compile options need to be enabled to allow libata to drive > this device? > > Can DMA be enabled on this device? > > I have an ss4200 running a custom compiled kernel running Fedora Core 12. There's no workaround at the moment. The root cause is the BIOS seems to be broken and incorrectly disables the PCI device for the PATA controller when the SATA controller is set to AHCI mode. A PCI quirk might be doable to forcibly re-enable the PATA controller so that ata_piix can drive it, depending on what exactly the BIOS has done to switch it off..