A change has been made to the SDL (Simple DirectMedia Layer) library codebase by default enabling work based on the Wayland protocol in environments that provide simultaneous support for Wayland and X11. Previously, in Wayland environments with the XWayland component, output using X11 was enabled by default, and in order to use Wayland, the application had to be launched with a special setting. The change will be part of the SDL 2.0.22 release scheduled for March. It is noted that for the full operation of SDL-based applications in Wayland, the presence of the libdecor library for decorating windows on the client side is required.
Source: opennet.ru