I just bought a small form factor computer (Dell Optiplex 9020) that has a serial port and mint installed but when I boot up the machine I can't monitor its serial information through this serial port. On another machine (a laptop) I have a Serial to USB converter cable directly connected to the Dell Optiplex 9020's serial port. I can't seem to get any type of response from the Optiplex's serial port. Any ideas? Thanks for any responses.