[Bug 1787374] Re: resolvconf fails to update DNS server after resuming laptop from suspend

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: resolvconf (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1787374

Title:
  resolvconf fails to update DNS server after resuming laptop from
  suspend

Status in resolvconf package in Ubuntu:
  Confirmed

Bug description:
  This bug has been present since I have updated to Ubuntu 17.10 and it
  is still present in Ubuntu 18.04. It seems pretty simple to understand
  and a solution should be straightforward, but I lack understanding for
  what application is failing to update the right configuration file.

  When I go to work and I start my laptop, my /run/resolvconf/interface/systemd-resolved is filled with this:
  nameserver 127.0.0.53
  search broadinstitute.org plc.hootoo.com

  When I come back home, DNS resolution does not work or works very
  slowly, most likely because my work DNS server broadinstitute.org is
  not reachable anymore, or maybe it is reachable but it is
  excruciatingly slow at responding.

  The solution is for me to edit /run/resolvconf/interface/systemd-resolved and remove the work DNS server:
  nameserver 127.0.0.53
  search plc.hootoo.com

  And then update /etc/resolv.conf with the following command:
  $ sudo /etc/init.d/resolvconf restart

  Alternatively, another solution is to reboot the laptop. Then
  everything works fine. This is clearly a bug, but I am not sure
  whether it is a NetworkManager's bug, a resolvconf's bug, or a systemd
  bug. Please help! :-)

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