[linux-audio-user] audiophile 2496 - spdif in

[jordan muscott]

wes schreiner wrote:

> jordan muscott wrote:
>
>> Ok to be honest I'm not gonna switch distros...... but are you saying 
>> that Redhat offers you extra software that allows you to change the 
>> IRQs that your pci cards are on?
>
>
>
> There is no such software on any distro. Your motherboard's BIOS 
> decides which PCI slots get which IRQs. In a few motherboards the BIOS 
> lets one select which IRQs get assigned to certain slots, but most 
> don't. So with most motherboards all one can do is move cards around 
> to different slots and then see what IRQ gets assigned.


Ah.. thankyou, this is what I thought to be the case.

> If your sound card and your ethernet card are sharing an IRQ, that's 
> because those PCI slots used both have the same IRQ assignment. If you 
> swap just those two cards slot-for-slot they will end up with the same 
> IRQ again. Try moving just one of the cards to another slot. If all of 
> your slots are full then move multiple cards.
>
> On some motherboards with some processors you can turn on Local APIC 
> support in your kernel config and get more IRQs to work with. Dual 
> processor motherboards, even if they have only one CPU installed, can 
> do this to get more IRQs. If you have dual CPUs you should already be 
> running a SMP kernel and you probably don't have IRQ assignment 
> problems. If you do, it's back to juggling cards.
>
> wes 


Again, thanks for the clear info.

Jordan.