On Sun, 2009-09-27 at 09:39 -0500, driveoldford wrote: > Martin: > "Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled" > So, I guess this means the serial port (there is only one) is found. > Then it should be /dev/ttyS0 because that's what I'd expect to see. Try running this command: ls -l /dev/ttyS* which should only find ttyS0 and show its access permissions. Post its output here. > I'm still stuck. However, on one of the computers, the serial is defined as ttyS1, > so, I'll try linking to that. Down, but not dead! > This computer should have found at least two serial to have ttyS1. Post the output from the same command for it as well. Martin