Vulkan unavailable, D3D12 used instead
Vulkan isn't working on your PC, so Luduvo switched to D3D12 for this run.
What you see
The log says Vulkan is unavailable and D3D12 is being used.
Who's affected
PCs with a broken or missing Vulkan install, on build 44 or newer.
What to do
- On its own this is fine. Luduvo can run on D3D12.
- If something failed after the switch, it's listed under this. Start there.
- A newer graphics driver may bring Vulkan back. unconfirmed
Status
Fixed in build 44. If you still see it, update Luduvo first.
Linked issues
- Often leads to Game won't start: D3D12 graphics error
- Often leads to Graphics can't run D3D12 feature level 12.0
How the Doctor spots it
It looks for log lines like these (patterns, not exact text):
Vulkan unavailable:using D3D12 for this run
Sources
Credits
- Kitty-kitkat, credited in the build 44 notes for the fallback fix
unconfirmed means a player suggested it and nobody has confirmed it works yet.
Last checked 26 Sep 2026.