From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263568AbUDNDk7 (ORCPT ); Tue, 13 Apr 2004 23:40:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263629AbUDNDk7 (ORCPT ); Tue, 13 Apr 2004 23:40:59 -0400 Received: from jive.SoftHome.net ([66.54.152.27]:37832 "HELO jive.SoftHome.net") by vger.kernel.org with SMTP id S263568AbUDNDkz (ORCPT ); Tue, 13 Apr 2004 23:40:55 -0400 From: plazmcman@softhome.net To: linux-kernel@vger.kernel.org Subject: 2.6.x DMA ALI chipset bugs Date: Tue, 13 Apr 2004 21:40:54 -0600 Mime-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Originating-IP: [209.77.201.156] Message-ID: Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org I have an old IBM ThinkPad (266MHz) with an ALi chipset. lspci -v | grep -i ali reports: [addr] Host bridge: ... M1531 Subsystem: ... M1531 [addr] ISA bridge: ... M1533 Subsystem: ...M1533 [addr] IDE interface: ... M5229 [addr] Bridge: ... M7101 Under kernel 2.4.22, DMA worked fine (~9MB/s hda). With 2.6.(0,3,4,5), the machine won't work with DMA enabeled at boot. Kernel panics due to "can't find init", and stuff like "can't execute /etc/rc.d/rc.S", or "/sbin/agetty", etc. I _do_ have kernel support (built-in) for ALiM15x3. I can boot up the computer (kernel argument ide=nodma), and then attempt to turn DMA on - it will sometimes succed, _but_ there is no performance gain (~4MB/s - ugh). Any workarounds, patches, help? Thanks, Brannon Klopfer