-force-vulkan seems not working on windows

hi guys

I have seen that we can use the command line to set the force graphics API. I've also seen that we can manually control the graphics API from Project Settings> Player.



then I want to try the Force Graphics API on hdrp 10. In Unity Hub, I set the command line to -force-vulkan. but when the editor window opens, the graphics API still says <DX11> is being used, also editor scene view is all white. meanwhile when I tried other graphics APIs, like GLES, GLCore, the window title changed according to the command line.



is this a bug? or am I using the command line incorrectly? do i need to sync command line and graphics api in project settings? or hdrp does not support vulkan?

sorry for bad english
thx for help

 

@nath7 Are you running on a laptop with multiple GPU's ? Unity does not correctly switch to Vulkan on multi-gpu setups, I've confirmed this myself on a laptop with an integrated Radeon GPU and an Nvidia RTX GPU. Both gpus are supported when checking vulkaninfo.

I've reported it as a bug to unity. Despite showing <DX11> in the title bar, the shader compiler will still attempt to compile shaders to Vulkan. When attaching Renderdoc to confirm the API, Unity will momentarily switch to <Vulkan> in the title bar, before crashing.

When disabling the Radeon gpu Unity will load with <Vulkan> in the title bar, but this is not the correct solution as Windows 10 performance degrades. Also Renderdoc will attach without Unity crashing.

If you are not running on a multi-gpu machine, ensure you have Vulkan supported drivers installed, and run vulkaninfo from the command prompt, it should list a bunch of stuff if the Vulkan runtime/drivers are installed correctly.