Vulkan Desktop Preview Cannot Find Graphics Driver

Hi all,

I am trying to develop an Android game using Vulkan but I am having some trouble getting it to work. I followed the tutorial here (https://docs.unrealengine.com/latest/INT/Platforms/Android/VulkanMobileRenderer/). I was able to get the build onto my Nexus 5X and it ran just fine (although I don’t know how to prove it is using Vulkan). I was also able to get it running in the viewport:
Vulkan_PIE.png

However when I try to play in game in the Vulkan preview window I get the error below. It tells me that I need to update my graphics card driver and that it can’t find my current driver version. But I have the latest graphics driver and the version number is higher than the recommend version number. You can see that in the window behind the error.
79f5cfe33a149e1bbba50fe513b49f7b77e92bfa.jpeg
**
Does anyone know why this is happening? **

P.S. As a side question does anyone know if I can prove that my phone is running Vulkan?

If you look in the logcat output tagged with UE4 you will see if it used Vulkan or not. Look for these messages:

Vulkan level: xx
Vulkan version: x.x.xx

Compiled with Vulkan support
Vulkan library detected, checking for available driver
Vulkan driver available, will use VulkanRHI

The dialog for Vulkan Preview are from the editor detecting a driver it doesn’t support. Look in Engine/Config/BaseHardware.ini under [GPU_NVIDIA] for the blacklist.

Sorry for the late response. I was able to confirm that my phone was using Vulkan with your method. Also 4.15 fixed the Vulkan preview for me.