i haven 't had time to look further into this; my apologies. still haven't got time, but i know that an ubuntu installation requires group 'dialout' for users, and that the relevant character devices have that too.
so try "sudo chown root:dialout /dev/ttyS4" ... i hope this solves it. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1087519 Title: Serial port ttyS4 doesn't work in 12.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1087519/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
