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

[Eli Zaretskii]

> From: Emanuel Evans <emanuel.evans@gmail.com>
> Date: Sat, 18 Oct 2014 09:02:01 -0700
> 
> Eli Zaretskii <eliz@gnu.org> 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.