[linux-audio-user] Setting IRQ on intel8x0-card

[Mathias Friman]

On Tue, 2006-10-10 at 10:17 -0400, Paul Davis wrote:

> > But at this point, the interrupt lines from onboard and external PCI
> > devices are already merged, so changing the IRQ would just move
> > both devices.
> > 
> > When an onboard device and a PCI card conflict, you have to move the
> > card to another slot (or, better, to fix the driver(s)).
> 
> just as a followup, ryan on #ardour pointed out the kernel boot argument
> "acpi_irq_balance" which results in *much* better distribution of IRQs
> among devices on my laptop. i still have the builtin soundcrap, plus the
> yenta and HDSP driver on the same IRQ, but i used to have the ethernet
> and two other devices there as well. others who tried it reported
> improvements as well.
> 

I tried with acpi_irq_balance and acpi_irq_pci=3,4,5,6,9,10,11,12,13,14
but that didn't change a thing. I still have my soundcard on the same
IRQ as my eth0, IRQ 11. It is also noteworthy that in the kernel
Documentation-directory there is a file "kernel-parameters.txt" which
lists all, surprise, kernel parameters that can be passed to the kernel
at boot-time. According to that list, it is possible to set IRQ on most,
if not all, OSS-drivers. It is also possible to set IO-addr and DMA, but
seemingly not in ALSA. Is it just a driver design issue or are the
systems in themselves that different?

Regards,
Mathias