Issue was caused by a faulty USB crossover. Thank you for your help!
** Changed in: network-manager (Ubuntu)
Status: New => Fix Released-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/728016 Title: network connections all die when other ethernet device is plugged in -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
