I can confirm the bug running a brand new Lubuntu 22.04, with package network-manager-vpnc-gnome version 1.2.8-2.
Running nm-connection-manager on a terminal, trying to add a new connection, Cisco Compatible VPN (vpnc), we can see the following message on terminal after filling all the fields: Cannot save connection due to error: Invalid setting General: connection.interface-name: '': interface name must not be empty There is also the same hint on the disabled Save button. With this message in mind, I just found a workaround: click "Advanced", fill the Tunnel interface name with tun0, click Apply. There is also a bug here because even then the Save button is still disabled, but if you click "Advanced" again and Apply, the Save button is finally enabled and you can Save the connection. I do not know why the tunnel interface would be required and if it really is, this field should be placed in the main form, not in the advanced window. However, I guess it should be still an optional field. The workaround is possible, on Ubuntu Gnome, only by editing the connection with Advanced Network Configuration (nm-connection-editor) and not the main Gnome Settings application. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to network-manager-applet in Ubuntu. https://bugs.launchpad.net/bugs/1968588 Title: Cannot create or add VPN in connection editor Status in network-manager-applet package in Ubuntu: Confirmed Bug description: In 22.04 I am unable to create a new VPN in network manager and nm- connection-editor. After filing in the entire form the save button remains disabled! watching the terminal provides this error: Cannot save connection due to error: Invalid setting General: connection.interface-name: '': interface name must not be empty Seems like the form validator is not looking at the right field! ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: network-manager-gnome 1.24.0-1ubuntu3 ProcVersionSignature: Ubuntu 5.15.0-25.25-generic 5.15.30 Uname: Linux 5.15.0-25-generic x86_64 ApportVersion: 2.20.11-0ubuntu80 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Mon Apr 11 10:49:34 2022 ExecutablePath: /usr/bin/nm-connection-editor InstallationDate: Installed on 2022-04-09 (1 days ago) InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Beta amd64 (20220329.1) IpRoute: default via 10.0.2.2 dev enp0s3 proto dhcp metric 100 10.0.2.0/24 dev enp0s3 proto kernel scope link src 10.0.2.15 metric 100 169.254.0.0/16 dev enp0s3 scope link metric 1000 IwConfig: lo no wireless extensions. enp0s3 no wireless extensions. ProcEnviron: SHELL=/bin/bash LANG=en_US.UTF-8 TERM=xterm-256color XDG_RUNTIME_DIR=<set> PATH=(custom, no user) RfKill: SourcePackage: network-manager-applet 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 SLAVE FILENAME Wired connection 1 31e61843-ef5f-31e8-96a2-cf86d47e015c ethernet 1649688323 Mon 11 Apr 2022 10:45:23 AM EDT yes -999 no /org/freedesktop/NetworkManager/Settings/1 yes enp0s3 activated /org/freedesktop/NetworkManager/ActiveConnection/1 -- /run/NetworkManager/system-connections/Wired connection 1.nmconnection nmcli-dev: DEVICE TYPE STATE IP4-CONNECTIVITY IP6-CONNECTIVITY DBUS-PATH CONNECTION CON-UUID CON-PATH enp0s3 ethernet connected full limited /org/freedesktop/NetworkManager/Devices/2 Wired connection 1 31e61843-ef5f-31e8-96a2-cf86d47e015c /org/freedesktop/NetworkManager/ActiveConnection/1 lo loopback unmanaged unknown unknown /org/freedesktop/NetworkManager/Devices/1 -- -- -- nmcli-nm: RUNNING VERSION STATE STARTUP CONNECTIVITY NETWORKING WIFI-HW WIFI WWAN-HW WWAN running 1.36.4 connected started full enabled enabled enabled enabled enabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager-applet/+bug/1968588/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

