zbiggy - thanks for the reply
> Is this usb 1.1 or usb 2.0 device?
Appears to be a 1.1 device manufacturer specs say
Computer Connector: USB 1.1/2.0 Compatible
Standard USB "A" type Conn.
> Does adding noapic or acpi=noirq
Tried several combinations nothing solved the problem. Here are results
noapic noacpi -- same usb_set_interface failed
noapic acpi_os=linux -- no sound control, reported DBus warning, urbs active message missing from dmesg
noapic acpi=noirq -- no sound control, reported DBus warning, urbs active message missing from dmesg
noapic acpi=oldboot same usb_set_interface failed
noapic acpi=ht -- no sound control, just unhung
> using discrete card with usb ports solves the problem for you
If you mean can I use the onboard sound? Yes Unfortunately, I wanted to use the USB audio to provide a second sound card to free up the on-board so I don't have change cables constantly.
> tell me your mainboard manufacturer and model.
The motherboard is an EVGA model 730a
> Does other usb 1.1 devices also does not work on your nForce mainboard?
They seem to.