Summary
The laptop’s built-in display sometimes becomes slightly brighter or darker while a project is open, in Unreal Engine 5.8.3. Moving the mouse often makes the brightness changes more obvious. The problem can happen even when the mouse is still. The entire display is. The editor remains responsive.
What Type of Bug are you experiencing?
Other
Steps to Reproduce
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Open a project in Unreal Engine 5.8.3.
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Keep the project open. Make sure it is visible on the laptops built-in display.
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Watch the display for changes, in brightness. The issue can happen when the project is just sitting open no action needed.
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Move the mouse around inside the editor. This often makes the brightness fluctuations more obvious. The problem can still happen without any mouse movement.
Expected Result
The screen brightness should remain stable, without any fluctuations.
Observed Result
The screen brightness fluctuates intermittently while the Unreal Engine project is open and visible. The entire display appears to become slightly brighter or darker, as if the backlight intensity were oscillating.
Moving the mouse usually makes the fluctuations more noticeable, but the issue can occur without mouse movement.
The editor does not freeze or become unresponsive.
Affects Versions
5.8
Platform(s)
Windows
Video
Additional Notes
Laptop: ASUS TUF Gaming F16 FX608JHR
CPU: Intel Core i7-14700HX
GPU: NVIDIA GeForce RTX 5050 Laptop GPU (8 GB VRAM)
Operating system: Windows 11 Home, version 25H2
Display resolution: 1920 × 1200
Display refresh rate: 165 Hz
Unreal Engine version: 5.8.3
NVIDIA driver version: 617.42
The issue occurs while the Unreal Engine project is open on the laptop’s built-in display. Moving the mouse usually makes the brightness fluctuations more noticeable.
Two videos demonstrating the issue are linked above.