[LyX/master] Fix #13305 - xcb is currently the only reasonable solution for Wayland

[José Matos]

On Tue, 2026-05-12 at 09:31 +0200, Pavel Sanda wrote:
> Riki, ok to backport? P

What is the culprit here?

Version 2.5.1 (Sunday, 12 April 2026) 
Qt Version (run-time): 6.10.3 on platform wayland
Qt Version (compile-time): 6.10.2
OS Version (run-time): Fedora Linux 44 (KDE Plasma Desktop Edition)
Python detected: 3.14.4 (/usr/bin/python3)
Draw strategy: partial draw on backing store

I have never seen the issues reported and I have been using wayland for a long
time. The only change from the original reporter is that I am using Qt 6.10.

This is a work-around for a bug. To say that xcb is currently the only
reasonable solution for Wayland is incorrect or at most incomplete.
-- 
José Abílio