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Date: Fri, 8 Jul 2005 22:27:53 +0200
From: Rudo Thomas <rudo@matfyz.cz>
To: Con Kolivas <kernel@kolivas.org>
Cc: linux kernel mailing list <linux-kernel@vger.kernel.org>,
       ck list <ck@vds.kolivas.org>
Subject: Re: 2.6.12-ck3
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> > > Time seems to pass very fast with this kernel.
> >
> > Am I the only one who gets this strange behaviour? Kernel's notion of
> > time seems to be about 30 times faster than real time.
> 
> Sorry I really have no idea. If you can retest with latest stable mainline 
> that this kernel is based on (2.6.12.2) and reproduce the problem

The following one-liner (from 2.6.12.2) seems to be the problem:

diff -urN linux-2.6.12-ck2-rudo/drivers/acpi/pci_irq.c linux-2.6.12-ck-rudo/drivers/acpi/pci_irq.c
--- linux-2.6.12-ck2-rudo/drivers/acpi/pci_irq.c        2005-07-08 10:16:53.000000000 +0200
+++ linux-2.6.12-ck-rudo/drivers/acpi/pci_irq.c 2005-07-03 21:06:10.000000000 +0200
@@ -435,6 +435,7 @@
                /* Interrupt Line values above 0xF are forbidden */
                if (dev->irq >= 0 && (dev->irq <= 0xF)) {
                        printk(" - using IRQ %d\n", dev->irq);
+                       acpi_register_gsi(dev->irq, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW);
                        return_VALUE(0);
                }
                else {

I will report this to the lkml shortly.

Rudo.