From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261945AbUBWQLD (ORCPT ); Mon, 23 Feb 2004 11:11:03 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261942AbUBWQLC (ORCPT ); Mon, 23 Feb 2004 11:11:02 -0500 Received: from mail.tmr.com ([216.238.38.203]:20352 "EHLO gaimboi.tmr.com") by vger.kernel.org with ESMTP id S261945AbUBWQJ1 (ORCPT ); Mon, 23 Feb 2004 11:09:27 -0500 Message-ID: <403A25B0.5090104@tmr.com> Date: Mon, 23 Feb 2004 11:09:20 -0500 From: Bill Davidsen User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6b) Gecko/20031208 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Krzysztof Halasa CC: linux-kernel@vger.kernel.org Subject: Re: ACPI and ISA IRQ 9, Linux 2.4 References: In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Krzysztof Halasa wrote: > Hi, > > I think this is a known problem, but I don't know how to fix it: > > I have a dual Pentium-2 machine (non-SCSI Asus P2B-D), latest BIOS with > ACPI etc. It has an ISA card (serial port) using IRQ 9 (I can't change > the IRQ). It works fine without ACPI, Linux 2.4 lists IRQ 9 as > APIC edge-triggered. > > With acpi=force (due to BIOS date) IRQ 9 is used by ACPI. /proc/interrupts > lists it as APIC level-triggered, and the ISA card no longer generates > interrupts. > > IRQ 9 is set to "ISA" in BIOS setup. acpi_irq_isa=9 doesn't help. > > Is is possible to fix it? Or is it just impossible to use ISA IRQ 9 > with ACPI? > > More details available on request, of course. I have a similar problem, and my aha1520 can't be moved off irq9 without cutting traces on the system board. How bad is it without ACPI at all? I tried that for a while, and several other things didn't work, and it looks as if the aha1520 driver won't share irq anyway, and something else (I forget) wants that irq as well. I boot into 2.4 to do backups, fortunately the only thing on the SCSI. -- bill davidsen CTO TMR Associates, Inc Doing interesting things with small computers since 1979