[LAU] Moving devices to different IRQs

It's probably hardwired and dependent on the mainboard but I thought I'd ask this anyway, just in case someone has an idea. I notice Chuckks' /proc/interupts is like this below whereas my Abit AN-M2 (nForce4) setup follows... is there anyway I can manipulate my interupts so the USB devices line up on a single IRQ like Chuckks ? CPU0 0: 7451384 IO-APIC-edge timer 1: 16910 IO-APIC-edge i8042 8: 0 IO-APIC-edge rtc 12: 91809 IO-APIC-edge i8042 14: 55194 IO-APIC-edge ide0 16: 17785 IO-APIC-fasteoi eth1, HDA Intel 17: 124946 IO-APIC-fasteoi bcm43xx 19: 41988 IO-APIC-fasteoi ohci_hcd:usb1, ohci_hcd:usb2, ehci_hcd:usb3 20: 1 IO-APIC-fasteoi yenta, tifm_7xx1 21: 3228 IO-APIC-fasteoi acpi CPU0 CPU1 0: 136 561 IO-APIC-edge timer 1: 49 27195 IO-APIC-edge i8042 8: 0 0 IO-APIC-edge rtc0 9: 0 30 IO-APIC-fasteoi acpi 14: 0 0 IO-APIC-edge libata 15: 0 0 IO-APIC-edge libata 16: 13465 13271804 IO-APIC-fasteoi ohci_hcd:usb1, ahci 17: 13523 11359306 IO-APIC-fasteoi ohci_hcd:usb2, eth0 18: 4 2906 IO-APIC-fasteoi ehci_hcd:usb3, HDA Intel 19: 5332 4029220 IO-APIC-fasteoi ehci_hcd:usb4, nvidia I have a problem with distorted USB sound (Tascam US-122) but no matter what USB port I use it is always doubled up with another device. If I could "force" all the USB busses onto one IRQ (or ideally ohci_hcd on one and ehci_hcd on another), and made sure my US-122 was the only USB device, then that might make a difference. --markc