Hi,
first of all, it might be interesting to know whether file notifications
do work at all on your system. What is the value of `file-notify--library'?
I suppose it is 'gfilenotify.
Could you, please, perform the following forms then:
(require 'filenotify)
(defun my-notify-callback (event)
(message "Event %S" event))
(file-notify-add-watch
"/tmp" '(change attribute-change) 'my-notify-callback)
(write-region "foo" nil "/tmp/foo")
(write-region "bla" nil "/tmp/foo")
(set-file-modes "/tmp/foo" (default-file-modes))
Tell, whether you see related messages in the *Messages* buffer.
Best regards, Michael.