Public bug reported:
If a process binds 127.0.1.1:53 and the network-manager ist started, it
tries to use this port (dnsmasq). It waits until the port is available.
That means no interaction with the network-manager is possible. So
unity-control-center stucks if "Network" is clicked or the nm-applet
does not respond if the user tries to change connection settings.
I think there should be a message that explains the problem: "network-
manager tries to set up dnsmasq on 127.0.1.1:53, but this port is
already in use. Retrying ..." and the associated GUI components should
stay responsive, but only the blocked options should be shown as blocked
by the problem.
You can verify the bug with the provieded script.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: network-manager 1.2.6-0ubuntu0.16.04.1
ProcVersionSignature: Ubuntu 4.4.0-83.106-generic 4.4.70
Uname: Linux 4.4.0-83-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.6
Architecture: amd64
CurrentDesktop: Unity
Date: Sun Jul 16 02:01:03 2017
IfupdownConfig:
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
auto enp0s25
iface enp0s25 inet manual
IpRoute:
default via 10.149.15.253 dev wlp3s0 proto static metric 600
10.149.0.0/20 dev wlp3s0 proto kernel scope link src 10.149.5.84 metric
600
169.254.0.0/16 dev br-d5edc0a60a9c scope link metric 1000
172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1 linkdown
172.18.0.0/16 dev br-d5edc0a60a9c proto kernel scope link src 172.18.0.1
NetworkManager.state:
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.NetworkManager.NetworkManager.conf:
2017-04-14T17:29:21.619202
nmcli-nm:
RUNNING VERSION STATE STARTUP CONNECTIVITY NETWORKING WIFI-HW WIFI
WWAN-HW WWAN
running 1.2.6 connected started full enabled enabled
enabled enabled enabled
** Affects: network-manager (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug xenial
** Attachment added: "script triggers the problem"
https://bugs.launchpad.net/bugs/1704600/+attachment/4915321/+files/crash_networkmanager.bash
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https://bugs.launchpad.net/bugs/1704600
Title:
network-manager stucks if 127.0.1.1:53 is in use
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