The recommended way to do this now seems to be: (when display-graphics-p (global-unset-key (kbd "C-z"))) Also, though this works with Emacs running as a

The recommended way to do this now seems to be: (when display-graphics-p (global-unset-key (kbd "C-z"))) Also, though this works with Emacs running as a server, I find it better to just quit emacsclient instead of learning to do something different depending on what environment it is running.