Subject: Re: bug#18757: 24.4; Intermittent screen flicker since upgrading to OS X 10.10

From: Eli Zaretskii <[email-masked]>
Date: Sat, 18 Oct 2014 19:27:40 +0300

> From: Emanuel Evans <[email-masked]>
> Date: Sat, 18 Oct 2014 09:02:01 -0700
> 
> Eli Zaretskii <[email-masked]> writes:
> 
> > Once the flicker starts, does it stop on its own, or does it continue
> > indefinitely?
> 
> It flickers once per window/buffer switch (it doesn't flicker when
> typing within a buffer), and it continues indefinitely.

And you are saying that the same pretest didn't exhibit such behavior
on the older OS version?  In that case, I guess there's some X event
that the new OS sends to Emacs that causes these redraws.  Perhaps Jan
could chime in and suggest some way of investigating this.