This morning DNS wasn't working on my laptop, though it worked perfectly
well on the server it wifi-ed to.
After some pinging and checking connections, I found this on my
laptop.

The file /etc/resolv.conf:

# Generated by Connection Manager
nameserver ::1
nameserver 127.0.0.1

Now why would the connection manager (conman) suddenly be setting my
nameserver to localhost? A few days ago everything worked.

Editing that file and replacing 127.0.0.1 by 8.8.8.8 and everything
worked again. Until the next time the commection manager needs to
connect, presumably.

-- hendrik