Cannot disable VSync in Editor (vulkan mode)

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1

Hello! When I start UE4 editor in OpenGL4 mode (UE4Editor -opengl4) I get 120 FPS but when I start it in Vulkan mode (UE4Editor w/o any additional parameters) my FPS gets locked on 75.

Tried inputting these console commands, got no result:
t.MaxFPS 150;
r.VSync 0;
r.VSyncEditor 0.

Distro: Pop!_OS 18.10 (Ubuntu 18.10 derivative);
NVIDIA drivers: 418.43.

2

Pass -vulkanpresentmode=0 when starting the editor. This will force VulkanRHI to use VK_PRESENT_MODE_IMMEDIATE_KHR.

3

Thank you, it works! Even though fps in editor in Vulkan mode is significantly lower than in OpenGL4.

4

Glad I’m not the only one experiencing this. Even on the default template projects Vulkan is maxing out at ~76 fps vs 120 fps in OpenGL.