Roger Heflin wrote: >And you are using ttyS0 for the serial port and that is the first real >hardware serial port, not the first USB serial port and at boot the >first usb serial port may not even actually exist yet... The serial-to-USB adapter is attached to ttyS0 on the problem machine. The USB end of the cable is attached to ttyUSB0 on the laptop. I have tested ttyS0 by connection elsewhere using straight serial and it works as it should. -- Dave Close, Compata, Irvine CA +1 714 434 7359 dave@xxxxxxxxxxx dhclose@xxxxxxxxxxxxxxxxxx "A difference has to make a difference in order to be a difference." -- Wendell Johnson -- _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue