I've also run into this CPU problem on 17.04. Like tlk, I had to install dnsmasq because I'm running a hotspot on a USB wifi device, and the system log indicated that it wouldn't work unless dnsmasq is installed.
I've also run into this CPU problem on 17.04. Like tlk, I had to install dnsmasq because I'm running a hotspot on a USB wifi device, and the system log indicated that it wouldn't work unless dnsmasq is installed.