What is the real reason to disable the existing uart on db1550? I checked the PCI configuration for the multi-port board. It seems the configuration is ok, including the memory map, irq number. The linux can find such information and register this device, but it just can't work :( thanks On 6/28/05, Jon Anders Haugum <jonah@xxxxxxxxxxxxxx> wrote: > On Mon, 27 Jun 2005, 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? > > My guess is that you can get it working if you disable the built-in serial > ports in the kernel. > > I've attached a quick'n'dirty patch I made for 2.4.27 that makes it > possible to use both internal and pci serial ports. It's a hack, but it > works. > > > -- > Jon Anders Haugum > > >