This is happening only if "Ethernet Lan Option Rom" is checked (active) in BIOS (ThinkPad X230). So there is the reason. After disabled this option IP is not lost after first renew.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1551351 Title: dhclient does not renew leases To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bind9/+bug/1551351/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
