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:[01] (IRQs 177/193) is showing > up while card 0a:0c.[01] (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. Alfred