This is the code of the elisp timer. This is actually a bug fix.

(defun check-frames-connection-timer ()
	(safe-check-frames-connection)
	(run-at-time 2 nil 'check-frames-connection-timer))
	(run-at-time 2 nil 'check-frames-connection-timer)

	(defun safe-x-check-frame (frame)
	(condition-case nil
	(x-check-frame frame)
	(error nil)))

	(defun safe-check-frames-connection ()
	(when (functionp 'x-check-frame)
	(dolist (frame (frame-list))
	(when (eq (framep frame) 'x)
	(safe-x-check-frame frame)))))