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

[wes schreiner]

Rick Taylor wrote:

>On Thu, 09 Oct 2003 07:49:02 -0500
>"wes schreiner" <wes at infosink.com> wrote:
>  
>
>>Robert Jonsson wrote:
>>    
>>
>>>Thursday 09 October 2003 12.26 skrev wes schreiner:
>>> 
>>>      
>>>
>>>>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
>>>>        
>>>>
>
>http://www.ibiblio.org/mdw/HOWTO/Serial-HOWTO-8.html#ss8.1
>  
>

OK, I forgot about lspnp/setpnp and lspci/setpci. I use lspnp/setpnp on 
my IBM Thinkpad 600E to turn the external serial port on and off, among 
other things. lspnp/setpnp require a kernel with PNP support compiled 
in. Kernel 2.4 mainline doesn't have this yet, but it is in the -ac 
patches and also in the kernel that some distros have (Redhat has it I 
think, but Debian doesn't). 2.6 has PNP support.

The support for using lspci/setpci is in all 2.4.x kernels I think, but 
it doesn't always do what you want. I have a Zoran 36057 video capture 
device sitting on IRQ 10, same as my sound card. IRQ 9 is unused (no 
ACPI), so I just tried "setpci -v -s 03:09.0 INTERRUPT_LINE=09" to 
change its IRQ. lspci -v still says it is at IRQ 10, but lspci -b -v 
says it is at IRQ 9. Which is it? OK, I modprobe zr36067 and the module 
loads, and now both lspci -v and lspci -v -b agree that the Zoran chip 
is at IRQ 10, so nothing changed. *Sigh* I suppose setpci will work in 
some cases, with some cards, but it sure isn't a panacea.

wes