[Pkg-utopia-maintainers] Bug#866689: network-manager: connectivity check fails on first run with dns=dnsmasq

[Mike Miller]

Package: network-manager
Version: 1.8.0-5
Severity: minor

Dear Maintainer,

With NetworkManager.conf containing

  [main]
  dns=dnsmasq

  [connectivity]
  uri=http://network-test.debian.org/nm

the first connection after a full restart of NetworkManager always
reports connection status as "limited".

After some small amount of time elapses, and forcing a second
connectivity check with "nmcli net con check", the connection status is
reported to be "full".

Looks very similar to this bug report:
https://bugzilla.gnome.org/show_bug.cgi?id=727616

With the debug log enabled, it looks to me like the connection is
established but dnsmasq has not fully started before the connectivity
check is run. Possibly racy, but I was able to reproduce it several
times in a row by restarting NetworkManager.service.

The libcurl error code in the log is 6 (CURLE_COULDNT_RESOLVE_HOST).

I have now switched to dns=systemd-resolved and this issue is no longer
present, this is as good a solution as any to me with full support for
systemd-resolved in 1.8.

I think this bug only appeared with 1.8.0.

-- System Information:
Debian Release: 9.0
  APT prefers testing
  APT policy: (900, 'testing'), (800, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.9.0-3-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages network-manager depends on:
ii  adduser                3.115
ii  dbus                   1.10.18-1
ii  init-system-helpers    1.48
ii  libaudit1              1:2.7.7-1+b1
ii  libbluetooth3          5.43-2
ii  libc6                  2.24-12
ii  libcurl3-gnutls        7.52.1-5
ii  libglib2.0-0           2.52.3-1
ii  libgnutls30            3.5.13-2
ii  libjansson4            2.9-1
ii  libmm-glib0            1.6.8-1
ii  libndp0                1.6-1+b1
ii  libnewt0.52            0.52.20-1+b1
ii  libnl-3-200            3.2.27-2
ii  libnm0                 1.8.0-5
ii  libpam-systemd         233-9
ii  libpolkit-agent-1-0    0.105-18
ii  libpolkit-gobject-1-0  0.105-18
ii  libpsl5                0.17.0-4
ii  libreadline7           7.0-3
ii  libselinux1            2.6-3+b2
ii  libsystemd0            233-9
ii  libteamdctl0           1.26-1+b1
ii  libudev1               233-9
ii  libuuid1               2.29.2-1
ii  lsb-base               9.20161125
ii  policykit-1            0.105-18
ii  udev                   233-9
ii  wpasupplicant          2:2.4-1

Versions of packages network-manager recommends:
ii  crda             3.18-1
ii  dnsmasq-base     2.77-2
ii  iptables         1.6.0+snapshot20161117-6
ii  iputils-arping   3:20161105-1
ii  isc-dhcp-client  4.3.5-3
ii  modemmanager     1.6.8-1
ii  ppp              2.4.7-1+4

Versions of packages network-manager suggests:
pn  libteam-utils  <none>

-- Configuration Files:
/etc/NetworkManager/NetworkManager.conf changed [not included]

-- no debconf information