[Bug 1699660] Re: systemd-resolve breaks resolution of local network hostnames

[Tom Fields]

IIRC what could be happening is that the additional timeout introduced
by systemd-resolved first doing the newly implemented LLMNR lookup
(which fails if not implemented by any device) causes some network tools
to not even try doing a DNS lookup using the DHCP- or user-supplied DNS
search domain suffixes.

The second invocation then maybe finds a cached result which is however
invalidated after some time - thus the varying or seemingly random
results.

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https://bugs.launchpad.net/bugs/1699660

Title:
  systemd-resolve breaks resolution of local network hostnames

Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  After upgrading to Ubuntu 17.04 (zesty), resolution of my local
  network's host names is completely broken.  Apparently the upgrade
  replaced my existing resolver with systemd-resolve, which deliberately
  refuses to pass "single-label" domain names to my domain name server.
  That is the server where all my network's host names are kept, so I
  can no longer resolve any of them.

  Apparently, this is yet another example of Poettering's upstream decisions causing denial of service to people who have been saddled with his malware.
  https://github.com/systemd/systemd/issues/2514#issuecomment-179203186

  Would someone sensible please put a stop to this forced breakage
  during upgrade, and advise on how to fix it now that the damage has
  been done?

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