EDitor Window/Dropdown Menus and notification and tooltips not working on COSMIC

Summary

Hi Everyone, I installed Unreal Engine 5.7.4 on POP OS 24.04 and unfortunately the Editor is broken. I suspect this is a wayland compatibility issues, the bugs so far are :

  • The dropdown menus/tooltips appear in the center of the screen, no matter where the window is.
  • I cannot press most of the dropdown menus buttons.
  • Notification popup cannot be interracted with or destroyed.

I made sure it is working through X11. also tried to run it with dx11 rather than 12, and disable FSAA/FXAA. disabling Tooltips seem to help but it is still broken

Hey there @Hamzo1999! Welcome to the community! There’s a known issue with some Linux windows managers and the recent updates. The change to SDL3 has been causing some issues, and there’s a couple workarounds in this thread. Hope this helps!

Thank you for your advice. I did check that post before I posted and sadly it didn’t help. I do not know if there is a COSMIC-specific issue. I am not sure or proficient enough tbh to figure it out. But I saw that 5.6 works just fine, so I would try that and see.

From what I gather this issue is prevalent across multiple Linux environments, and since the change itself is largely systemic, a hotfix likely won’t suffice. Definitely give 5.6 a try and let me know how it goes!

I got to try it out now for a while. and 5.6 works well but some popup windows cannot be interracted with, like the autosave popup. It is not as bad as before. I did not look too much for a solution cause I had to start working on what I had to do

Ahh so it’s possible there was a preexisting interaction with COSMIC and Unreal’s transient windows. I can’t find any fixes or workarounds specifically in 5.6 as the original transience issue for most linux users was corrected prior to it. Was 5.6 the earliest instance of issues?

I really can’t tell you if it is, I am very new to UE and that is the oldest version I tried.