Kubuntu 16.04 LTS network connection (VPN, and WPA2 WLAN) fails: "connection.gateway-ping-timeout: cannot set property: value of "###" of type 'guint' is invalid or out of range for property type 'gateway-ping-timeout' of type 'guint'"

[Thomas Dreibholz]

Just freshly installed Kubuntu 16.04. When trying to create a VPN in the network manager settings, the following error occurs:

"connection.gateway-ping-timeout: cannot set property: value of "###" of type 'guint' is invalid or out of range for property type 'gateway-ping-timeout' of type 'guint' "

"###" is sometimes a different value and sometimes repeating.

The issue happens for PPTP VPN as well as OpenConnect VPN (network-manager-openconnect was installed for this). It seems to be currently not possible to use Kubuntu 16.04 with a VPN, due to this bug. Therefore, it is quite critical for mobile usage (laptop) in public WLANs.

$ apt-show-versions | grep network-manager
network-manager:amd64/xenial 1.1.93-0ubuntu4 uptodate
network-manager:i386 not installed
network-manager-openconnect:amd64/xenial 1.0.2-1build1 uptodate
network-manager-openconnect:i386 not installed
network-manager-pptp:amd64/xenial 1.1.93-1ubuntu1 uptodate
network-manager-pptp:i386 not installed

Other users seem to have the problem as well:
- https://askubuntu.com/questions/761646/intermittent-networkmanager-error-on-importing-ovpn-files-or-editing-such-conne
- http://ubuntuforums.org/showthread.php?t=2321553

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
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CurrentDesktop: KDE
Date: Mon Apr 25 21:28:45 2016
InstallationDate: Installed on 2016-04-25 (0 days ago)
InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.3)
IpRoute:
 default via 172.31.255.254 dev wlp3s0 proto static metric 600
 default dev enp0s25 scope link metric 1002 linkdown
 169.254.0.0/16 dev enp0s25 proto kernel scope link src 169.254.13.163 linkdown
 172.31.255.0/24 dev wlp3s0 proto kernel scope link src 172.31.255.121 metric 600
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-con:
 NAME UUID TYPE TIMESTAMP TIMESTAMP-REAL AUTOCONNECT AUTOCONNECT-PRIORITY READONLY DBUS-PATH ACTIVE DEVICE STATE ACTIVE-PATH
 Forskningsnettverk Sognsvann 2bbff8c3-4a62-43e1-8bca-11af323eead6 802-11-wireless 1461612320 Mo 25 Apr 2016 21:25:20 CEST yes 0 no /org/freedesktop/NetworkManager/Settings/0 yes wlp3s0 activated /org/freedesktop/NetworkManager/ActiveConnection/0
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH CONNECTION CON-UUID CON-PATH
 wlp3s0 wifi connected /org/freedesktop/NetworkManager/Devices/2 Forskningsnettverk Sognsvann 2bbff8c3-4a62-43e1-8bca-11af323eead6 /org/freedesktop/NetworkManager/ActiveConnection/0
 enp0s25 ethernet unmanaged /org/freedesktop/NetworkManager/Devices/0 -- -- --
 lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/1 -- -- --
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.

[Thomas Dreibholz (dreibh)]

The bug not only affects VPN but also connecting to WLAN with WPA2 Enterprise via Tunnelled TLS. When trying to connect to such a WLAN, saving the configuration aborts with the same error message.

[Maxiride (maxiride-gmail)]

Having the same issue on Kubuntu 16.04 while connecting to a regular PEAP, MSCHAPv2 wifi network.
Changing settings in the network manager doesn't seems to work, everything gets reverted back when closing the window.

[Max (maxisoft-it)]

Kubuntu 16.04. Same problem: when i try to make static ip connection. It is really annoying. I have to delete connection and make a new one every time.

[Shinjo Park (peremen)]

Kubuntu 16.04, same problem when I try to change nearly any setting. I tried following things:

* Changing status of IPv4/IPv6 enabled (wired/wireless)
* Changing APN of integrated 3G modem

Sometimes it works, sometimes it does not.

[Jochen Gruse (lpnet)]

This too is a duplicate of bug #1569674, which already links to an upstream bug fix.

Jochen

[Cyberpunk21 (cyberpunk21)]

This bug has been reported and they have provided a patch to the networkmanager-qt package. I am looking for people to test it. If you can install one of the following packages (one is for amd64 and the second is i386)

https://launchpad.net/~clivejo/+archive/ubuntu/xenial/+files/libkf5networkmanagerqt6_5.18.0-0ubuntu2~ubuntu16.04~ppa1_amd64.deb

https://launchpad.net/~clivejo/+archive/ubuntu/xenial/+files/libkf5networkmanagerqt6-dbg_5.18.0-0ubuntu2~ubuntu16.04~ppa1_i386.deb

It worked for me. Please let me know if the patched package solves your problem.

[Cynthia (c2588551)]

I can confirm that this patch solved the issue.

I highley appreciate the quick and proper action on this.

Kind Regards

[gnagnibu (gnagnibu)]

It works!