Comment 7 for bug 1624320

So this issue bit me in a weird way. I had my bridge called "xenbr0" and the result of these two interacting gives me absolutely no DNS resolution since the /etc/resolv.conf just pointed to 127.0.0.53 and didn't include the DNS server from my "xenbr0". Renaming the bridge to "renbr0" caused it to work. Why "renbr0"? Because in /run/resolvconf/interface/ there is a file called systemd-resolved that I was guessing was stopping combining the files once it hit the systemd-resolved.