Public bug reported:

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'.

** Affects: network-manager (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial

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https://bugs.launchpad.net/bugs/1578533

Title:
  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'"

Status in network-manager package in Ubuntu:
  New

Bug description:
  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'.

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