bug#28695: 26.0.60; Rendering lag spikes caused by double-buffering on Linux

[Eli Zaretskii]

> Date: Wed, 04 Oct 2017 11:04:49 +0200
> From: martin rudalics <rudalics@gmx.at>
> 
> Unless this problem (and that of Bug#28652) get fixed, we should either
> disable double buffering by default or add some special warning so users
> do not have to spend their time investigating this issue.

Isn't it strange that only some people see these problems, while
others (the majority?) are very happy with double-buffering?  Could it
be that the problems are triggered by some specific system
configurations or Emacs build-time features?  If so, we could perhaps
turn it off only for those configurations, because people who are
happy with this are extremely happy, and will probably be disappointed
if we just turn it off globally.