Everytime I upgrade my Ubuntu based OS, I think maybe this is the year that systemd-resoved just works and every year its just a big bag of disappointment. I spend hours troubleshooting why my VPN DNS resolution has just stopped working. Maybe next time I’ll remember I wrote this post.

How to disable systemd-resolved

sudo systemctl disable systemd-resolved
sudo systemctl stop systemd-resolved

sudo rm /etc/resolv.conf

# Then put the following lines in the [main] section of your /etc/NetworkManager/NetworkManager.conf:

# Ubuntu <= 20.04
sudo systemctl restart network-manager

# Ubuntu >= 20.10
sudo systemctl restart NetworkManager.service

That’s it. Now we’re back to regular old /etc/resolv.conf based DNS configuration.