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Date: Mon, 10 May 2004 01:07:31 -0400 (EDT)
From: Patrick Reynolds <reynolds@cs.duke.edu>
To: Len Brown <len.brown@intel.com>
cc: linux-kernel@vger.kernel.org
Subject: Re: ACPI and broken PCI IRQ sharing on Asus M5N laptop
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On Sun, 9 May 2004, Len Brown wrote:

> On Sun, 2004-05-09 at 20:44, Patrick Reynolds wrote:
> > Booting with default parameters puts the i8042 psmouse channel, the
> > Intel
> > 8x0 sound card, and the Cardbus controller all on IRQ 12.  The mouse
> try booting with "acpi_irq_isa=12"

That worked.  The interrupts got redistributed like so:
  6:        172          XT-PIC  Intel 82801DB-ICH4, yenta
  7:       3014          XT-PIC  uhci_hcd, yenta, ndiswrapper
  8:          4          XT-PIC  rtc
  9:        188          XT-PIC  acpi
 12:       1028          XT-PIC  i8042

> I'd be interested to see your dmesg and /proc/interrupts from 2.6.1

It piles the sound and cardbus onto IRQ 5, along with a USB that I'm
actually using.  For some reason it doesn't touch IRQ 6.  Here are dmesg
and /proc/interrupts from 2.6.1, 2.6.6 w/ acpi_irq_isa=12, and 2.6.6 w/
your patch:

http://www.cs.duke.edu/~reynolds/acpi-notes

On Sun, 9 May 2004, Len Brown wrote:

> On the assumption that cmdline works, please try this patch
> (without any cmdline param).
>
> It simply tweaks the heuristic and makes IRQ12 less attractive compared
> to the others.

That also worked and produced the same IRQ mapping as acpi_irq_isa=12.

Thanks!  If you want any more logs, etc, let me know.

--Patrick