[LAU] IRQ tuning

[Roman Muñoz]

Hi,

After some days browsing for info, it looks like I'm being unable to 
tune my IRQs to get my sound card on its own, exclusive IRQ.

I'm using 2.6.21.3-rt9 on Debian Etch now, but:

a) sound card is on IRQ 17 with ehci on IRQ 17 too. Both sound card 
(intel hda) and usb are motherboard (NVIDIA CK 804) ones. I'm not 
getting xruns, and I was thinking it was quite fine and probably 
hardware-related.

b) However, I can not get those nice 255 IRQ vectors even if local apic 
and io-apic on uniprocessor are active. I even tried to use debian 
kernel configuration as much as possible (on 2.6.18 I get the vectors) 
but they seem to be unavailable as soon as I patch the kernel with 
Ingo's patch.

So I think now this could be software-related and I would be able to set 
  IRQs.  What's the matter? Could you guys give me some up-to-date pointers?

Thanks
Roman