[tlug] How to change IRQ address for a sound card?

["Stephen J. Turnbull" <stephen@example.com>]

Dave M G writes:

 > However, one web page about Audacity said playback may be stuttered if 
 > the sound card is sharing an IRQ with something else.

I'm not up on recent hardware buses (AKA anything more recent than
SCSI-1 ;-), but my understanding is that the modern standards are
supposed to make IRQ issues a thing of the past.

 >  20:        800   IO-APIC-fasteoi   uhci_hcd:usb4, HDA Intel

Are you using /dev/usb4 for anything?  If not it seems unlikely to be
the cause of the interference.

 > Lastly, the web site said audio devices "prefer" to be on IRQ 9, 10, or 
 > 11. I have 10 and 11 open, so...
 > How can I safely get my HDA Intel audio device to be on IRG 10 or 11?

Find out what the driver is.  Then find out if it has a parameter that
allows setting the irq (typically irq=xx where xx is a decimal
number).  If it's a module, then you can unload the module with
rmmod, and reload it with "modprobe module irq=xx".  If it's not a
module, you'll need to find out how to pass parameters to subsystems
using your boot loader and reboot.

I don't think you should expect much relief if you succeed though.

Again, if somebody who actually knows this stuff should speak up,
listen to them instead. ;-)