I upgraded a Xenial system to Yakkety, then enabled -proposed and installed the new version of network-manager.
bdmurray@clean-xenial-amd64:~$ apt-cache policy network-manager network-manager: Installed: 1.2.6-0ubuntu1 Candidate: 1.2.6-0ubuntu1.1 Version table: 1.2.6-0ubuntu1.1 500 500 http://192.168.10.7/ubuntu yakkety-proposed/main amd64 Packages *** 1.2.6-0ubuntu1 500 500 http://192.168.10.7/ubuntu yakkety-updates/main amd64 Packages 100 /var/lib/dpkg/status 1.2.4-0ubuntu1 500 500 http://192.168.10.7/ubuntu yakkety/main amd64 Packages bdmurray@clean-xenial-amd64:~$ sudo apt-get install network-manager Reading package lists... Done Building dependency tree Reading state information... Done The following packages will be upgraded: network-manager 1 upgraded, 0 newly installed, 0 to remove and 52 not upgraded. Need to get 1,996 kB of archives. After this operation, 0 B of additional disk space will be used. Get:1 http://192.168.10.7/ubuntu yakkety-proposed/main amd64 network-manager amd64 1.2.6-0ubuntu1.1 [1,996 kB] Fetched 1,996 kB in 0s (82.5 MB/s) (Reading database ... 188256 files and directories currently installed.) Preparing to unpack .../network-manager_1.2.6-0ubuntu1.1_amd64.deb ... Unpacking network-manager (1.2.6-0ubuntu1.1) over (1.2.6-0ubuntu1) ... Processing triggers for ureadahead (0.100.0-19) ... Setting up network-manager (1.2.6-0ubuntu1.1) ... Processing triggers for systemd (231-9ubuntu4) ... Processing triggers for man-db (2.7.5-1) ... Processing triggers for dbus (1.10.10-1ubuntu1.1) ... bdmurray@clean-xenial-amd64:~$ sudo shutdown -r now Connection to clean-xenial-amd64.local closed by remote host. Connection to clean-xenial-amd64.local closed. After the reboot I had network connectivity. $ ssh clean-xenial-amd64.local Welcome to Ubuntu 16.10 (GNU/Linux 4.8.0-49-generic x86_64) Setting to verification-done. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1676547 Title: No network connectivity after upgrade from 16.04 to 16.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1676547/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs