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

[Hamzo1999]

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

[SupportiveEntity]

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!

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Hi, thank you! This topic helps a lot. I’m using Kubuntu 25.10 (KDE) As stated in the Updating Unreal Engine on Linux to SDL3 | Unreal Engine 5.7 Documentation | Epic Developer Community SDL3 does not work well with Wayland yet. While Wayland support is compiled into the SDL3 library, Unreal Editor using pure Wayland is unusable. Mouse click events are not correctly received (though touch events are) and in general there are a number of issues. X11Wayland support is fine and Editor works a…

[Hamzo1999]

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.