Thanks Circling. In my case, there is no network manager issue. It is the avahi multicast issue. Even without the script, the card wlan0 indicates MULTICAST is on, but the MSI cannot ping to other avahi hosts, and vice versa.
-- RTL8187SE driver lacks Multicast Support https://bugs.launchpad.net/bugs/360926 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
