network-manager - kubuntu 16.04, unable to change existing network interface : reason="connection.gateway-ping-timeout: can not set property: value "34163392" of type 'guint' is invalid or out of range for property 'gateway-ping-timeout' of type 'guint'"

[yossarian_uk]

I am unable to change any settings within network-manager for any wired interface (not tried wireless) - if you try to change anything (i.e dns servers, ipv6 settings, change from dhcp -> dhcp address only) you get an error (and the setting doesn't change)

i.e - in this example I selected 'require IPV4' and I get

May 5 09:13:08 mcox-N552VW NetworkManager[810]: <info> [1462435988.7023] audit: op="connection-update" uuid="c91931f0-15d1-4d29-9b76-e80ef5a4abcd" name="Wired connection 1" result="fail" reason="connection.gateway-ping-timeout: can not set property: value "34184640" of type 'guint' is invalid or out of range for property 'gateway-ping-timeout' of type 'guint'"

(similar errors occur if you try to change any setting)

This is happening on multiple machines.

As a 'work-around' you have to remove the interface and re-add to change settings.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: network-manager 1.1.93-0ubuntu4
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CurrentDesktop: KDE
Date: Thu May 5 09:04:39 2016
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2016-05-03 (1 days ago)
InstallationMedia: Kubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
IpRoute:
 default via 192.168.90.1 dev enp3s0f1 proto static metric 100
 default via 192.168.90.1 dev wlp2s0 proto static metric 600
 169.254.0.0/16 dev enp3s0f1 scope link metric 1000
 192.168.90.0/24 dev enp3s0f1 proto kernel scope link src 192.168.90.187 metric 100
 192.168.90.0/24 dev wlp2s0 proto kernel scope link src 192.168.90.147 metric 600
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH CONNECTION CON-UUID CON-PATH
 enp3s0f1 ethernet connected /org/freedesktop/NetworkManager/Devices/1 Wired connection 1 c91931f0-15d1-4d29-9b76-e80ef5a4abcd /org/freedesktop/NetworkManager/ActiveConnection/0
 wlp2s0 wifi connected /org/freedesktop/NetworkManager/Devices/0 CPGB-STAFF 07b9076e-a493-4bdf-bf85-0c77537cc692 /org/freedesktop/NetworkManager/ActiveConnection/1
 B8:5E:7B:22:5B:F0 bt disconnected /org/freedesktop/NetworkManager/Devices/3 -- -- --
 lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/2 -- -- --
nmcli-nm: Error: command ['nmcli', '-f', 'all', 'nm'] failed with exit code 2: Error: Object 'nm' is unknown, try 'nmcli help'.

[Launchpad Janitor (janitor)]

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

[Portnov (portnov84)]

Hi
Any updates please? This is pretty serious bug; host is unable to connect to network after system startup. sudo service network-manager restart helps, but it is not convenient to restart service manually after system startup...

[yossarian_uk (morgancoxuk)]

This is the same bug as

https://bugs.launchpad.net/ubuntu/+source/networkmanager-qt/+bug/1569674

[Launchpad Janitor (janitor)]

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