Re: Trouble getting all my com-ports (ttyS*)

["Michael D. Kralka" <michael.kralka@xxxxxxx>]

Christopher Thorjussen wrote:
> I just installed CentOS 5.1 on a Dell Vostro 200 (Intel G33) which has a
> Sunix PCI-Express (x1) 8-port RS-232 card installed. For me it looks
> like only 4 ports are recognized, but I'm not sure if it's even working
> with those 4.

<snip>

> How can I get the other 4 enabled?

Pass "8250.nr_uarts=8" to the kernel to tell it to create more than the
default 4 serial ports (add to /etc/grub/menu.lst and reboot). NOTE: the
maximum number of UARTs supported by the CentOS 5 kernel (as of
2.6.18-8.1.8.el5) seems to be 32.

Cheers,
Michael
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