Subject: bug#20943: 25.0.50; Dired buffers are not always auto-reverterd

From: Eli Zaretskii <[email-masked]>
Date: Wed, 01 Jul 2015 18:25:48 +0300

> From: Mark Karpov <[email-masked]>
> Date: Wed, 01 Jul 2015 13:15:54 +0600
> 
> > A second thought: auto-reverting dired buffers has been changed to use
> > file notifications. Does it make a difference, when you eval the form
> > (setq auto-revert-use-notify nil) ?
> 
> No, it doesn't make any difference.

You need to change that via customize-variable, because this option
has a non-trivial setting function.  Did you do that?