[CentOS] How do I configure additional serial ports?
Alfred von Campe
alfred at 110.net
Fri Mar 9 17:10:55 UTC 2007
On Mar 9, 2007, at 11:41, Paul Heinlein wrote:
> Still, what leaps out at me in your verbose lspci listings (below)
> is that the card with PCI ID 0a:0a: (IRQs 177/193) is showing
> up while card 0a:0c. (IRQs 217/225) isn't showing up at all.
> I don't understand why each card is getting two IRQs, but I'd
> expect to see something like
> ttySX at I/O 0xXXXX (irq = 217) is a 16C950/954
> show up in your dmesg. Instead, all the ttySX listings from your
> dmesg have IRQs from only one of the cards.
Yes, that is the problem. In another reply, someone mentioned a
kernel configuration option that may be limiting the number of serial
ports, which I'll be looking into.
> Have you verified that each card works properly if installed by
> itself, without the other?
Yes, they both work fine in either PCI slot.
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