Re: Flicker on MS Windows

[Po Lu]

Óscar Fuentes <ofv@wanadoo.es> writes:

> Eli Zaretskii <eliz@gnu.org> writes:
>
>>> Emacs 27 & 28 are annoyingly flickering here as well (Windows 7 and up,
>>> dunno about XP) compared to the same configuration under Lucid.
>>
>> Does the Lucid build have double-buffering enabled?
>
> Now that you mention that, I seem to recall something about double
> buffering that greatly reduced Lucid's flickering on the past.
>
> How can I check that double buffering is enabled?

Double buffering is enabled by default on all X11 builds, unless you
specify a configure-time option.  It's unrelated to the toolkit being
used (although GTK 3 has problems that cause a big black square to
appear for a moment when a frame is being resized, I'm looking into
that.)

Your X server must of course support the double buffering extension, but
most today do.