It also does not work trying the option "-4" from this bug report: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/657302
tail -3 /etc/init/ssh.conf add -4 to the last line exec /usr/sbin/sshd -4 -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. https://bugs.launchpad.net/bugs/684084 Title: ssh X11 forwarding does not work for KDE applications -- 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