D3D12 Vulkan Driver doesn't work

[theoparis]

Bug description

To Reproduce

Steps to reproduce the behavior:

• Use nixos wsl with nixos-unstable
• Install vulkan-tools
• Run VK_DRIVER_FILES=/run/opengl-driver/share/vulkan/icd.d/dzn_icd.x86_64.json vulkaninfo --summary

Logs

[nixos@nixos:/etc/nixos]$ VK_DRIVER_FILES=/run/opengl-driver/share/vulkan/icd.d/dzn_icd.x86_64.json vulkaninfo --summary
WARNING: [Loader Message] Code 0 : terminator_CreateInstance: Received return code -9 from call to vkCreateInstance in ICD /nix/store/638y6yx9m2f5il7azqy1fn3hcczwjvfx-mesa-25.3.3/lib/libvulkan_dzn.so. Skipping this driver.
ERROR: [Loader Message] Code 0 : terminator_CreateInstance: Found no drivers!
Cannot create Vulkan instance.
This problem is often caused by a faulty installation of the Vulkan driver or attempting to use a GPU that does not support Vulkan.
ERROR at /build/source/vulkaninfo/./vulkaninfo.h:573:vkCreateInstance failed with ERROR_INCOMPATIBLE_DRIVER

WSL version

WSL version: 2.6.3.0
Kernel version: 6.6.87.2-1
WSLg version: 1.0.71
MSRDC version: 1.2.6353
Direct3D version: 1.611.1-81528511
DXCore version: 10.0.26100.1-240331-1435.ge-release
Windows version: 10.0.26200.7623

[songpola]

From my research, your return code is corresponding to VK_ERROR_INCOMPATIBLE_DRIVER = -9.

I also got the same issue but with different return code, which is VK_ERROR_INITIALIZATION_FAILED = -3.

$ ls /usr/lib/wsl/lib/
libd3d12.so  libd3d12core.so  libdxcore.so

$ LD_LIBRARY_PATH=/usr/lib/wsl/lib vulkaninfo --summary
WARNING: dzn is not a conformant Vulkan implementation, testing use only.
Dropped Escape call with ulEscapeCode : 0x03007703
MESA: error: ID3D12DeviceFactory::CreateDevice failed
WARNING: [../src/microsoft/vulkan/dzn_device.c:1137] Code 0 : VK_ERROR_INITIALIZATION_FAILED
ERROR: [Loader Message] Code 0 : setup_loader_term_phys_devs: Call to 'vkEnumeratePhysicalDevices' in ICD /nix/store/wy8xvqjn24y2hhwp5j483hjdbb869nkf-mesa-25.3.5/lib/libvulkan_dzn.so failed with error code -3

And, without specifying LD_LIBRARY_PATH=/usr/lib/wsl/lib, Mesa couldn't find the libd3d12.so that would be dynamically loaded by libvulkan_dzn.so, which will return the same code as yours.

$ vulkaninfo --summary
WARNING: [Loader Message] Code 0 : terminator_CreateInstance: Received return code -9 from call to vkCreateInstance in ICD /nix/store/wy8xvqjn24y2hhwp5j483hjdbb869nkf-mesa-25.3.5/lib/libvulkan_dzn.so. Skipping this driver.

[songpola]

Related: #623 (comment)