If you use the -v option then you should be able to find out the reason. It might be as simple as the server not having xauth installed.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1697891 Title: SSH X11 forwarding broken on Zesty To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1697891/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
