From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265085AbUFAPXP (ORCPT ); Tue, 1 Jun 2004 11:23:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262279AbUFAPXB (ORCPT ); Tue, 1 Jun 2004 11:23:01 -0400 Received: from bhhdoa.org.au ([216.17.101.199]:3088 "EHLO bhhdoa.org.au") by vger.kernel.org with ESMTP id S262106AbUFAPW1 (ORCPT ); Tue, 1 Jun 2004 11:22:27 -0400 Message-ID: <1086094667.40bc7d4b63f91@vds.kolivas.org> Date: Tue, 1 Jun 2004 22:57:47 +1000 From: Con Kolivas To: linux-kernel@vger.kernel.org Subject: ICH5 irq fails in 100% native mode MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT User-Agent: Internet Messaging Program (IMP) 3.2.2 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org While recently setting up a new machine with 2.6.3 and then 2.6.7-rc2 I discovered this over and over again causing system stalls: disabling IRQ18 syslog showed: Jun 2 00:31:28 localhost kernel: irq 18: nobody cared! Jun 2 00:31:28 localhost kernel: [__report_bad_irq+42/121] [note_interrupt+145/175] [do_IRQ+279/321] [common_interrupt+24/32] [__do_softirq+66/177] [do_softirq+45/47] [do_IRQ+286/321] [common_interrupt+24/32] [default_idle+0/44] [default_idle+41/44] [cpu_idle+46/60] [start_kernel+407/467] [unkno wn_bootoption+0/294] dmesg revealed this: ICH5: 100%% native mode on irq 18 Adding "noapic" to boot options simply moved the error to IRQ5 and occurred routinely during boot at the ICH5 definition. A quick google revealed the IDE settings in BIOS might be related so I disabled the "ENHANCED" option for the ide controller which is both P-ATA and S-ATA and chose the "COMPATIBLE" option. The error went away, and now dmesg shows this: ICH5: not 100%% native mode: will probe irqs later While I am not able to determine whether there is any performance penalty for this it seems that the probing of irqs at this point is responsible. The hardware is an ASUS P4P800S motherboard with i848 chipset + ICH5 and a 2.8C P4HT. While this is a workaround I wonder what I/we need to do to make it work in native mode. Advice? Con