NetworkManager 1.10 from F28, with OVS enabled.
In case of nm failing to start ovs bridge on os startup, try systemctl edit ovsdb-server.service
[Service]
ExecStartPre=-/usr/bin/rm /etc/openvswitch/conf.db
This is a companion discussion topic for the original entry at https://copr.fedorainfracloud.org/coprs/yunta/NetworkManager-ovs/