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SubjectRe: IO APIC IRQ assignment
Keith Chew wrote:
>
> We asked the manufacturers if they can do a physical modication for
> us, but unfortunately this is not possible. The engineer did mention
> that under Windows XP in "IO APIC" mode, it is possible to assign
> different IRQs to the USB and BTTV.
>
> Is this possible in Linux? We have tried enabling IO APIC in the
> kernel, but the IRQs are still shared.
>
> Please advise if it is even possible in Linux to achieve what we want.
>

You could try enabling "Bus Options" ->
[*] Message Signaled Interrupts (MSI and MSI-X)

or in .config
CONFIG_PCI_MSI=y

It only works for PCI devices.

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