Unreal Mouse Entry and UI not working

Development Programming & Scripting UI
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1

Unreal is extremely buggy about allowing me enter values in fields or click in fields to make adjustments, close windows etc.

For example, I am trying to turn off realtime rendering and I cannot select the field before it is lost. Or I am trying to choose and image source but unable to.

I am running Ryzen 3950X with 64 Gbs RAM and a RTX 4070Ti. Ubuntu latest.


Here you can see me trying to select things repeatedly and it doesn’t work.

Any ideas what the problem is?

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Does it do the same with a blank template or just that particular project?

2 Likes
3

Excellent question.

Yes it does.

I think it has something to do with Linux/Unreal interaction.

I can’t close the windows using the mouse (clicking on the “x”) but I can close it with ctrl-W. I can sometimes get things to respond by clicking on the background and then clicking back onto the window.

I am going to do a complete update of everything and see if that helps.

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Update: Everything updated, latest drivers latest version of Unreal.

Neither Unreal 5.2.1 nor 5.6 will launch.

Pretty disappointing.

What do people know about Linux/Unreal?

Update: Rolling back to NVIDIA driver 535 for linux has gotten 5.2.1 started again. Though the editor hangs a while when opening.

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I have no experience with this, but it seems quite a few others have reported the same. Below are some AI compiled troubleshooting options:

1. Update Graphics Drivers

  • Ensure your GPU drivers are up-to-date. For NVIDIA, AMD, or Intel GPUs, download the latest drivers from their official websites or use your Linux distribution’s package manager to update them.

2. Adjust UE5 Settings

  • Disable Real-Time Rendering in Viewport: Go to the viewport settings and turn off real-time rendering to reduce resource usage.
  • Lower Editor Scalability Settings: Navigate to Settings > Engine Scalability Settings and lower the quality settings for the editor.
  • Disable Plugins You Don’t Need: Unused plugins can consume resources. Disable unnecessary ones in the Plugins menu.

3. Optimize Linux System

  • Switch to a Lightweight Desktop Environment: If you’re using a resource-heavy desktop environment like GNOME or KDE, consider switching to a lighter one like XFCE or LXQt.
  • Close Background Applications: Ensure no unnecessary applications are running in the background.
  • Enable High-Performance Mode: Use tools like cpufreq to set your CPU to performance mode.

4. Check Vulkan Support

  • UE5 on Linux performs better with Vulkan. Ensure Vulkan is enabled in your project settings:
    • Go to Project Settings > Platforms > Linux and ensure Vulkan is selected as the default RHI (Rendering Hardware Interface).

5. Update UE5

  • If you’re using an older version of UE5, update to the latest version. Epic Games frequently releases patches that improve performance and fix bugs.

6. System Hardware Check

  • Ensure your system meets the recommended hardware requirements for UE5. If your hardware is on the lower end, consider upgrading components like RAM or GPU.

If the issue persists, you might want to check the UE5 forums or Linux-specific communities for additional troubleshooting tips. You’re not alone in this, and many developers share solutions for similar challenges!

1 Like
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  1. I did this but niether 5.6 nor 5.2.1 would run with the latest driver. I went back a few generations and at least 5.2.1 works.
  2. Real-time rendering is disabled. Actually its pain that it somehow turns itself on now and then.
  • other points…got it.
  1. I’m on Ubuntu - I will look into this. However, my computer and GPU is fairly reasonable. I am not sure that will be the magic bullet.
  2. Will do.
  3. Have updated and the update will not run at all. 5.2.1 with an earlier driver will run.
  4. As per my OP, my system is a 16-core, 32 thread, 64 RAM Ryzen 3950 with an NVIDIA RTX 4070 Ti. It should be more than capable of handling Unreal Engine.

Thanks for the response. I’ll have to keep digging. I have systems running Windows that are less powerful than this one, but they might be more suitable.

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Sorry, I couldn’t be of more help; this is beyond my level. Good luck.

1 Like