How to get a lava pci serial card working in ubuntu hardy

apt-get install setserial

When you run a lspci -v it will list your lava card and it should look something like this:

Serial controller: Lava Computer mfg Inc Unknown device 0900 (prog-if 02 [16550])
Flags: slow devsel, IRQ 16
I/O ports at 9800 [size=256]
I/O ports at 9400 [size=256]
From this info you can create a command with setserial.  For me the command I run is below

setserial /dev/ttyS0 port 0×9800 irq 16 uart 16550a baud_base 115200

If that works you can now just create a file:

/etc/serial.conf

/dev/ttyS0 port 0x9800 irq 16 uart 16550a baud_base 115200

Is the only thing in the file.   You should be up and running. That is all I had to do.