Enabling a four-port serial card

[Tom Horsley]

On Thu, 6 Dec 2007 16:51:14 -0800 (PST)
David Scriven <davidwriter at yahoo.com> wrote:

> I'm trying to enable a four-port serial card

The magic (for non Xen kernels, anyway) is to add a kernel
boot parameter such as: 8250.nr_uarts=9 (that gets the 1
port on my motherboard + an 8 port card to work).

For Xen the situation is much more complex since the
hypervisor steals serial ports and the serial driver
isn't linked in, but is a loadable module. I never
really figured Xen out...