InputEventMouseMotion does not work until the window is switched, dragged or resized

[jmdejong]

Godot version

4.0 alpha1

System information

Recently updated archlinux, xfce4 desktop, Vulkan API 1.2.203, AMD RADV OLAND Also tested on cinnamon desktop

Issue description

When I start a new scene and move the mouse around in the scene I do not get InputEventMouseMotion events. Clicking or keypresses are registered, but do not change anything.

If I select a different window and then alt-tab back to the game window then I do get InputEventMouseMotion events. Dragging or resizing the window fixes the problem too.

Steps to reproduce

• Open the Minimal reproduction project
• Move the mouse around over the window. Maybe even click sometimes
• Check the output of the prints. On my machine it does not show any InputEvenMouseMotions.

Minimal reproduction project

https://github.com/jmdejong/godot4_alpha_InputEventMouseMotion

[Sauermann]

This has been solved in #56548.