Sounds to me like this is an issue with the default gateway setting. Please try to edit the connection for the device you don't use to access the internet, go to the ipv4 tab, and under the Routes button, check the "use this connection only for the resources in its network". Then please let us know if this resolves your issue.
Thanks! -- 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
