Unfortunately this is still happening with the patch from comment #3. In fact I do not even need to create a VPN connection for this. If I install easy-openvpn-server:
$ snap install easy-openvpn-server it creates two tun devices (tun0 and tun1) that can be seen with "ip address" command. That makes NM create the corresponding devices and connections: /ssh:ubuntu@localhost#8022: $ /snap/bin/network-manager.nmcli c NAME UUID TYPE DEVICE netplan-ens3 bec3d02a-c9e5-3283-92ab-ee43a4246c85 ethernet ens3 tun0 edc2d2e1-b126-475d-8d5b-1a5b3bfd43d3 tun tun0 tun1 2945f4f4-2d44-4a61-83b4-cee73fd81129 tun tun1 /ssh:ubuntu@localhost#8022: $ /snap/bin/network-manager.nmcli d DEVICE TYPE STATE CONNECTION ens3 ethernet connected netplan-ens3 tun0 tun connected (externally) tun0 tun1 tun connected (externally) tun1 lo loopback unmanaged but unfortunately these connections are still written as static connections in /etc/netplan/. And when I reboot, I see 4 of them: /ssh:ubuntu@localhost#8022: $ /snap/bin/network-manager.nmcli c NAME UUID TYPE DEVICE netplan-ens3 bec3d02a-c9e5-3283-92ab-ee43a4246c85 ethernet ens3 tun0 864e0de2-e5c6-4c9b-aa7f-20aef970067c tun tun0 tun1 ddfc7db2-2baa-488f-95da-c8e1e66e458b tun tun1 default be2bc22c-fc98-4b2b-9484-fd4d5c838d5f vpn -- tun0 3c1e12f9-1a08-4a6f-aef3-5ea22d9e9bb2 tun -- tun1 eb8ed73b-3312-401f-a4c4-c26aadb3a014 tun -- The files look like https://paste.ubuntu.com/p/KvTVXPwK75/ -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/1998207 Title: netplan network-manager plugin tries to save temporary connections Status in netplan: Triaged Status in network-manager package in Ubuntu: Fix Committed Bug description: When creating an OpenVPN connection, a temporal connection called tunN is created. For instance, after activating a connection called vpntest, I have: NAME UUID TYPE DEVICE vpntest 458856e6-8f0f-4dc6-82f2-dd72868252a0 vpn ens3 tun0 1eb1dbe8-5678-4818-9adf-fb2dc01ed132 tun tun0 tun0 is created/removed after activating/deactivating vpntest and should not really be saved, but I see netplan adding it in /etc/netplan. And while doing so the plugin also reports some errors (I see these when stopping the connection): Nov 28 16:16:57 ubuntu NetworkManager[11752]: <error> [1669652217.2920] BUG: the profile cannot be stored in keyfile format without becoming unusable: cannot access file: No such file or directory Nov 28 16:16:57 ubuntu NetworkManager[11752]: ((src/libnm-core-impl/nm-connection.c:342)): assertion '<dropped>' failed Nov 28 16:16:57 ubuntu NetworkManager[11752]: <warn> [1669652217.2920] keyfile: commit: failure to write 1eb1dbe8-5678-4818-9adf-fb2dc01ed132 ((null)) to "/run/NetworkManager/system-connections/tun0-1eb1dbe8-5678-4818-9adf-fb2dc01ed132.nmconnection": keyfile writer produces an invalid connection: cannot access file: No such file or directory To manage notifications about this bug go to: https://bugs.launchpad.net/netplan/+bug/1998207/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
