Just want to point out that "chroot installs" or netboot installs are NOT the only places this breaks. I did a a straightforward upgrade (via do-release-upgrade) from Ubuntu GNOME 16.04.n (latest packages installed) to Ubuntu GNOME 16.10, on a standard desktop system where the wired network was managed by NM before.
After the upgrade, no wired interface was available. Luckily my desktop also has a wireless interface (which I never used before); that still worked so I could continue to search for help: it took two days on and off but I finally found this bug (I was searching NetworkManager documentation and looking through nmcli output, journalctl output, etc. but there is nothing shown anywhere about this; most likely NM should be modified so that it prints something useful to the logs if it skips interfaces due to the unmanaged-devices setting). The solution above (replacing with an empty file) then running "sudo killall -HUP NetworkManager" caused my wired connection to immediately reappear and connect. In any event, this change is kind of a disaster; regardless of the intentions behind it the results are far too disruptive and the reasons for the problem and the solution are far too obscure and difficult for the average desktop user to be expected to figure out. This change should be reverted until some alternative solution that is more carefully targeted to only impact the correct set of systems can be devised and implemented. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/1658921 Title: NetworkManager does not manage wired connection Status in network-manager package in Ubuntu: Confirmed Bug description: NetworkManager does not manage my wired eth0 connection, no matter how I set /etc/network/interfaces or /etc/NetworkManager/NetworkManager.conf Using ubuntu 16.04, /etc/network/interfaces only managed lo, and [ifupdown] section of NetworkManager.conf had set managed=false. With these same settings, after upgrading to ubuntu 16.10, eth0 appears as unmanaged in nm-applet. If I modify /etc/network/interfaces and add auto eth0 iface eth0 inet dhcp And set managed=true in NetworkManager.conf [ifupdown] section, eth0 is still unmanaged despite it does get an IP from DHCP server. This is happening in my five computers (two laptops and three desktops). To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1658921/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
