Re: can't find interrupt number under /proc/interrupts for the pci multi-port on db1550

[Alan Cox <alan@lxorguk.ukuu.org.uk>]

On Maw, 2005-06-28 at 01:06, rolf liu wrote:
> I am running 2.4.31 on db1550 with a pci multi-port board. the kernel
> starts up ok. but after start-up, I can't find the corresponding
> interrupt number for this board, which is irq 2. I can find the device
> under /proc/devices and /proc/tty/driver, etc. So I am now sure if it
> is working ok. Is there good (simple) method to test this serial port?

Do something like

        cat /dev/ttySwhatever

then look at the IRQ list. The interrupt will only be allocated while
the port is in use.