Since bug 274930 implemented added functionalities in Network Manager regarding OpenVPN, the network-manager-openvpn plugin needs to be updated to 0.9 version to benefit from those improvements.
At the moment, with the 0.899 version it is impossible to connect to a openvpn server; the following is generated in the syslog file:
Sep 11 09:25:38 abc NetworkManager[1594]: <info> Starting VPN service 'openvpn'...
Sep 11 09:25:38 abc NetworkManager[1594]: <info> VPN service 'openvpn' started (org.freedesktop.NetworkManager.openvpn), PID 5083
Sep 11 09:25:38 abc NetworkManager[1594]: <info> VPN service 'openvpn' appeared; activating connections
Sep 11 09:25:38 abc NetworkManager[1594]: <info> VPN plugin state changed: 1
Sep 11 09:25:38 abc NetworkManager[1594]: <info> VPN plugin state changed: 3
Sep 11 09:25:38 abc NetworkManager[1594]: <info> VPN connection 'XYZ' (Connect) reply received.
Sep 11 09:25:38 abc NetworkManager[1594]: <warn> VPN connection 'XYZ' failed to connect: 'property 'user-name' invalid or not supported'.
Sep 11 09:25:38 abc NetworkManager[1594]: <warn> error disconnecting VPN: Could not process the request because no VPN connection was active.
Sep 11 09:25:38 abc NetworkManager[1594]: <info> Policy set 'Auto eth0' (eth0) as default for IPv4 routing and DNS.
Sep 11 09:25:43 abc NetworkManager[1594]: <info> VPN service 'openvpn' disappeared
When will it be updated?