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Wayland Cursor Lock Broken on Linux – Add SDL Input Support Instead of GLFW

On Linux Wayland (e.g., Kubuntu 25.10 / Plasma 6), Minecraft’s cursor lock / relative mouse input is broken in fullscreen mode. This is due to the current LWJGL → GLFW input backend, which does not fully support Wayland’s pointer constraints and relative motion protocols.

While Vulkan rendering is planned in the summer drop, this does not fix cursor locking, as that is handled by the input library.

I strongly suggest adding SDL-style input support (or a similar Wayland-compliant input backend) alongside Vulkan. SDL handles relative mouse motion and pointer confinement reliably on Wayland, which would finally allow proper mouse locking and smooth camera control for Linux users.

This change would make Wayland a fully playable environment without relying on X11 workarounds, nested X11, or borderless fullscreen hacks.

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    I agree, we need that Mojang!
    Since you are already modernizing your code, this sounds perfect.

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    Registered User commented
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    SDL also works for Windows and Mac, SDL is generally much better than GLFW input, so since already Mojang is modernizing their code (with upcomming stuff like Vulkan) Ditching GLFW input for SDL sounds great.