Ubuntu 17.04 on a Dell E6530, fresh install with copying of some
networkmanager setup in /etc/ from good old Ubuntu 16.04.01 LTS and
using the same home partition.

My version of this bug is really miraculous. It was here for a week,
today disappeared.

For a week I had problems with ONE of the four locations where I connect to the 
net:
- home-wifi (OK)
- home-cable (OK)
- work-cable (BAD)
- work-wifi (OK).
Problems only with 17.04, 16.04 working flawlessly.

Problem was repeatable - nslookup working until I started firefox.
Firefox showing Google home page ONCE, then all requests showing
"unavailable", even reloading the home page. Also any later nslookup
failing with "REFUSED".

Two days ago I upgraded following to "zesty-proposed", but it did NOT
help for yesterday. Maybe it needed time????


Upgraded the following packages:
libnss-resolve (232-21ubuntu2) to 232-21ubuntu3
libpam-systemd (232-21ubuntu2) to 232-21ubuntu3
libsystemd0 (232-21ubuntu2) to 232-21ubuntu3
libsystemd0:i386 (232-21ubuntu2) to 232-21ubuntu3
libudev1 (232-21ubuntu2) to 232-21ubuntu3
systemd (232-21ubuntu2) to 232-21ubuntu3
systemd-sysv (232-21ubuntu2) to 232-21ubuntu3
udev (232-21ubuntu2) to 232-21ubuntu3


Maybe today (Sat) my work net services are less/more overloaded, so DNS query 
timing is different? I will see again on Mon.

Anyway, strange - it seems that some timing or some combination of
circumstances break the local DNS system....

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https://bugs.launchpad.net/bugs/1654918

Title:
  No Internet access with default of  Automatic (DHCP)

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