try to enable the loopback interface. its solves the problem for me. i add:
# The loopback network interface auto lo iface lo inet loopback to /etc/network/interfaces -- no longer honors X11 forwarding https://bugs.launchpad.net/bugs/136947 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
