I can confirm I'm getting this error too. Althou it seems to be a bit random I can confirm I didn't get it in Ubuntu 12.04. I wish I could be more precise but I can't tell if this is something caused by other process... so I can't tell if started happening on 16.04 or after installing some package.
Ubuntu 16.04 3.13.0-92-generic NetworkManager --version: 1.2.2 Here I paste some interesting lines from dmesg: ----- [ 19.350616] systemd[1]: network-online.target: Found ordering cycle on network-online.target/start [ 19.350623] systemd[1]: network-online.target: Found dependency on NetworkManager-wait-online.service/start [ 19.350628] systemd[1]: network-online.target: Found dependency on NetworkManager.service/start [ 19.350631] systemd[1]: network-online.target: Found dependency on basic.target/start [ 19.350634] systemd[1]: network-online.target: Found dependency on sockets.target/start [ 19.350638] systemd[1]: network-online.target: Found dependency on uuidd.socket/start [ 19.350641] systemd[1]: network-online.target: Found dependency on sysinit.target/start [ 19.350645] systemd[1]: network-online.target: Found dependency on firestarter.service/start [ 19.350648] systemd[1]: network-online.target: Found dependency on network-online.target/start [ 19.350654] systemd[1]: network-online.target: Breaking ordering cycle by deleting job NetworkManager-wait-online.service/start [ 19.350659] systemd[1]: NetworkManager-wait-online.service: Job NetworkManager-wait-online.service/start deleted to break ordering cycle starting with network-online.target/start [ 19.350750] systemd[1]: network.target: Found ordering cycle on network.target/start [ 19.350754] systemd[1]: network.target: Found dependency on NetworkManager.service/start [ 19.350758] systemd[1]: network.target: Found dependency on basic.target/start [ 19.350762] systemd[1]: network.target: Found dependency on sockets.target/start [ 19.350765] systemd[1]: network.target: Found dependency on uuidd.socket/start [ 19.350768] systemd[1]: network.target: Found dependency on sysinit.target/start [ 19.350771] systemd[1]: network.target: Found dependency on firestarter.service/start [ 19.350775] systemd[1]: network.target: Found dependency on network-online.target/start [ 19.350778] systemd[1]: network.target: Found dependency on network.target/start [ 19.350781] systemd[1]: network.target: Breaking ordering cycle by deleting job NetworkManager.service/start [ 19.350785] systemd[1]: NetworkManager.service: Job NetworkManager.service/start deleted to break ordering cycle starting with network.target/start ----- I'm not sure if the problem is in NetworkManager service itself or if there is any other service messing around and causing these "ordering cycles" which seems to end killing the NetworkManager process. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/1582986 Title: NetworkManager service does not start during bootup Status in network-manager package in Ubuntu: Confirmed Bug description: Ubuntu 16.04 4.4.0-22 systemd 229-4 network-manager 1.1.93 network-manager-gnome 1.2.0 Multiple services and targets are deleted by systemd to "break ordering cycle" (cf. boot.log), but NetworkManager is the only one of them (network.target,rpcbind,sysinit.target,open-iscsi.service,remote- fs-pre.target,iscsid.service,zfs-fuse.service - cf. their respective logs) which is not started after bootup: sudo systemctl status NetworkManager.service ● NetworkManager.service - Network Manager Loaded: loaded (/lib/systemd/system/NetworkManager.service; enabled; vendor preset: enabled) Active: inactive (dead) May 18 05:00:10 samsung-ubuntu systemd[1]: NetworkManager.service: Job NetworkManager.service/verify-active deleted to break ordering cycle starting with network.target/start Attachments: ----------- - journalctl -l -b0 --system _COMM=systemd > boot.log - systemctl -l status rpcbind > rpcbind.log - systemctl -l status network.target > network.target.txt - systemctl -l status remote-fs-pre.target > remote-fs-pre.target.log - systemctl -l status sysinit.target > sysinit.target.log - systemctl -l status zfs-fuse.service > zfs-fuse.service.log - systemctl -l status open-iscsi.service > open-iscsi.service.log - systemctl -l status iscsid.service > iscsid.service.log To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1582986/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
