On Wed, 4 Jul 2018, at 4:53 AM, Eli Zaretskii wrote:

> > From: Robert Pluim <rpluim@gmail.com>

> > Cc: Eli Zaretskii <eliz@gnu.org>,  32032@debbugs.gnu.org

> > Date: Tue, 03 Jul 2018 11:20:15 +0200

> >

> > >> Try disabling double-buffering (etc/NEWS describes how to do that).

> > >

> > > Thanks Eli. That works. :-)

> > > 

> > > Any way to *build* Emacs so that  it disables by default double-buffering?

> >

> > It doesnʼt look that way, if configure finds the Xdbe extension Emacs

> > uses it. You could add

> >

> > '(inhibit-double-buffering . t)

> >

> > to default-frame-alist, or uninstall the Xdbe.h header.

>

> Given that there are known bugs with this feature that no one is

> working on, perhaps we should introduce an optional configure switch

> to build without double-buffering.

Agreed. Does it make sense for a Emacs source code newbie to chip in here?