[Bug 1631241] Re: Name resolution stops working after resume from suspend

[Martin Pitt]

With NetworkManager we switched back to the "dnsmasq" plugin, so it is
indeed correct that resolv.conf only contains 127.0.1.1. It also does
that without suspending.

So what is actually not working?

** Changed in: systemd (Ubuntu)
       Status: New => Incomplete

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Title:
  Name resolution stops working after resume from suspend

Status in systemd package in Ubuntu:
  Incomplete

Bug description:
  After upgrading to Yakkety, when my Ubuntu GNOME laptop resumes from
  suspend DNS resolution stops working.

  After resuming, systemd-resolved is running and libnss-resolve is
  installed, but /etc/resolv.conf contains 127.0.1.1 as the the only
  name server. The dnsmasq-base package is installed since it is pulled
  in by both network-manager and lxc1, and both NM and libvirt have
  spawned instances of dnsmasq:

  >  1155 pts/2    S+     0:00 grep dnsmasq
  >  2724 ?        S      0:00 dnsmasq -u lxc-dnsmasq --strict-order --bind-interfaces --pid-file=/run/lxc/dnsmasq.pid --listen-address 10.0.3.1 --dhcp-range 10.0.3.2,10.0.3.254 --dhcp-lease-max=253 --dhcp-no-override --except-interface=lo --interface=lxcbr0 --dhcp-leasefile=/var/lib/misc/dnsmasq.lxcbr0.leases --dhcp-authoritative
  >  2992 ?        S      0:00 /usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf --leasefile-ro --dhcp-script=/usr/lib/libvirt/libvirt_leaseshelper
  >  2993 ?        S      0:00 /usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf --leasefile-ro --dhcp-script=/usr/lib/libvirt/libvirt_leaseshelper
  > 22879 ?        S      0:00 /usr/sbin/dnsmasq --no-resolv --keep-in-foreground --no-hosts --bind-interfaces --pid-file=/var/run/NetworkManager/dnsmasq.pid --listen-address=127.0.1.1 --cache-size=0 --conf-file=/dev/null --proxy-dnssec --enable-dbus=org.freedesktop.NetworkManager.dnsmasq --conf-dir=/etc/NetworkManager/dnsmasq.d

  Let me know if you need any extra info.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.10
  Package: libnss-resolve 231-9git1
  ProcVersionSignature: Ubuntu 4.8.0-17.19-generic 4.8.0-rc7
  Uname: Linux 4.8.0-17-generic x86_64
  ApportVersion: 2.20.3-0ubuntu7
  Architecture: amd64
  CurrentDesktop: GNOME
  Date: Fri Oct  7 13:52:40 2016
  InstallationDate: Installed on 2015-07-22 (443 days ago)
  InstallationMedia: Ubuntu-GNOME 15.04 "Vivid Vervet" - Release amd64 (20150422)
  SourcePackage: systemd
  UpgradeStatus: Upgraded to yakkety on 2016-10-05 (1 days ago)

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