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SubjectRe: APIC IO changes in 2.1.118.
MOLNAR Ingo writes:
>
> On Mon, 31 Aug 1998, Matthew G. Marsh wrote:
>
> > Perhaps this snippet from the Intel MB site may help -
> >
> > IRQ9 cannot be re-assigned
> >
> > IRQ9 is not available to assign to
> > ISA add-in cards because it is
> > dedicated to the power
> > management function of the PIIX4
> > controller on the motherboard.
> > This is true for other motherboards
> > which use the 82371AB PIIX4
> > component.
>
> this looks promising. We can safely detect the PCI ID of the 82371AB PIIX4
> runtime, instead of querying the ACPI BIOS about the status of IRQ9 (which
> we cant do currently) ... thus the horrible hack of disabling IRQ9 on all
> boards can go away.

Hm. I didn't realise we did this. Could this possibly be the cause of
a problem a friend of mine is having with his sound interface? He has
to boot Windoze first (oops, better not slag off M$, they might demand
records of all my email;-) which properly sets up the sound interface,
which is on IRQ 9. He's got a Gateway Solo laptop.
Perhaps Windoze set up IRQ 9 on the motherboard which Linux can later
use for the sound interface?

Regards,

Richard....

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