Looking through the recent comments, it seems that deleting ~/.freedp/known_hosts (or using FQDN) solves the problem.
This is fixed upstream: https://github.com/FreeRDP/Remmina/issues/68 ** Summary changed: - Remmina refuses to connect after Precise Upgrade + Cannot connect to RDP if host fingerprint changes -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/944040 Title: Cannot connect to RDP if host fingerprint changes To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/remmina/+bug/944040/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs