This problem has been happening to me recently with up to date Ubuntu 16.04 amd64 desktop.
Workaround is to clean up the broken state by removing all leases: 1. Disconnect from the network in Network Manager 2. Execute: sudo rm /var/lib/NetworkManager/dhclient*.lease 3. Connect to the network in Network Manager After this dhclient -6 keeps running and IPv6 leases are renewed correctly. I had this problem on a second very similar installation. There it has been verified that dhclient -6 process is killed/crashed right after acquiring the IPv6 address, so I had a second reproduction. I saved the contents of /var/lib/NetworkManager and can send it to the developer fixing it on request. There must be something there crashing dhclient in IPv6 mode. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1533631 Title: dhclient killed when DHCPv6 lease is out-of date To manage notifications about this bug go to: https://bugs.launchpad.net/network-manager/+bug/1533631/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
