Mouse not working under Wayland

General Feedback & Requests
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Hi! I am using Unreal Engine on Linux, and my laptop display requires fractional scaling, so I have to use Wayland (Hyprland compositor). Unreal Engine has issues on Xwayland for me, especially with context menus or anything that requires dragging, as well as sometimes going into a state where it renders one frame every few seconds until restarted. Additionally, due to X11’s lack of fractional scaling support, the editor gets scaled up and becomes very blurry under Xwayland.

However, when I launch the editor with the environment variable SDL_VIDEODRIVER=wayland to force it to use Wayland, I am unable to click any buttons, and hovering also is not responded to. It’s as if Unreal Engine does not see my mouse at all. Keyboard interaction still works fine. How can I troubleshoot this? Am I setting something up wrong?
I am using Unreal Engine version 5.1.1-23901901+++UE5+Release-5.1, on Arch Linux.

2

I’m having the same problem on my end with Wayland, did you ever find a fix?

3

Hello,
I ended up going with this.
Good luck!

4

This is an old post, but I’ll leave it here for those who, like me, are still wandering.
I added SDL_DYNAMIC_API=/usr/lib/libSDL2.so to my environment.
And my mouse works!
Check here: Unreal Engine 5 - ArchWiki
They say there’s a slight issue, but it hasn’t occurred to me yet.