Hi Ralph, Nope, not this time. IRQ 5 is used only by three instances of uhci_hcd, and although it becomes disabled shortly after bootup, the USB interface continues to work anyway. My IRQ assignments look like this: CPU0 0: 2094923 IO-APIC-edge timer 1: 2832 IO-APIC-edge i8042 2: 0 XT-PIC cascade 5: 100000 IO-APIC-level uhci_hcd, uhci_hcd, uhci_hcd 8: 4 IO-APIC-edge rtc 14: 10277 IO-APIC-edge ide0 15: 18332 IO-APIC-edge ide1 16: 258202 IO-APIC-level ohci_hcd, hsfpcibasic2 17: 329 IO-APIC-level ohci_hcd, EMU10K1 18: 1183 IO-APIC-level ehci_hcd, eth0 19: 2049001 IO-APIC-level wctdm NMI: 0 LOC: 2094638 ERR: 0 MIS: 0 I'm not sure why there should be three instances of uhci_hcd, but otherwise this layout looks okay to me. The important thing for me is that the Digium wctdm card does not have to share an interrupt with anybody. That seems critical to asterisk. Chuck -- The Moon is Waning Gibbous (89% of Full) But you can still get downloads from http://www.mhcable.com/~chuckh