I have a serious issue after upgrading from Ubuntu 16.10 to 17.04.
My machine is connected to wifi and IP address is obtained. But there is no internet connection.
Everything was working fine before the upgrade.
In /var/log/syslog
I can see many DNSSEC validation failed
messages.
I tried this, but did NOT help:
[device]
wifi.scan-rand-mac-address=no
Then restart network-manager