How to pinpoint the package responsible for an unhandled IRQ?

[Kynn Jones <kynnjo@gmail.com>]

My kernel logs a message that includes

    irq 16: nobody cared

...and proceeds to disable IRQ #16.

This unhandled IRQ is causing significant problems in my system, so
I'm trying to get to the bottom of it.

My understanding is that such unhandled IRQs are usually driver bugs.

If this is the case, how can I determine the driver responsible for this bug?

Thanks in advance!

kj