Also seeing this issue in Ubuntu 17.10 (artful) with: dnsmasq-base 2.78-1 systemd 234-2ubuntu12.1
I can confirm that following https://askubuntu.com/a/968309/ resolves the issue! Steps to fix the issue: Added this line to /etc/default/dnsmasq: DNSMASQ_EXCEPT=lo Then restarting dnsmasq: sudo systemctl daemon-reload sudo systemctl restart dnsmasq No more systemd-resolved taking 99-100% of a CPU core! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1670959 Title: systemd-resolved using 100% CPU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dnsmasq/+bug/1670959/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs