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So I have two graphic cards, Intel and Nvidia. Xplane also has two versions,

  1. OpenGL
  2. Vulkan

In steam, when I set

__NV_PRIME_RENDER_OFFLOAD=1 __GLX_VENDOR_LIBRARY_NAME=nvidia %command%

I can run XPlane 11 in OpenGL mode by using Nvidia. I know that beacuse when I run nvidia-smi, I am getting.

| 0 N/A N/A 18819 G ...X-Plane 11/X-Plane-x86_64 25MiB

which seems that XPlane is using Nvidia Drivers,

However, when I try __NV_PRIME_RENDER_OFFLOAD=1 %command% to run Xplane in Vulkan mode, the game does not seem to use Nvidia since I am getting nothing via nvidia-smi command.

So what should I type in Steam Launch Options to run Xplane11 in Nvidia-Vulkan ? Or what could be the cause of the problem...?

I am using Fedora 35 and I have installed vulkan and vulkan-tools. I also have tried -vulkan and -force-vulkan commands.

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