Comment 1 for bug 1727237

What is the release / package version in use of systemd?

How is the networking configured: netplan, ifupdown, networkd, networkmanager?

What is the contents of /etc/resolv.conf?

Where does the symlink of /etc/resolv.conf point to? (if it is a symlink)

What is the contents of /etc/systemd/resolved.conf ?

Is libnss-resolve package installed?

What is the output of $ systemd-resolve --status ?
(if --status option is available)

Is this a captive portal hostage situation with Ubuntu failing to get to the captive portal to enable internet?