World of Warcraft on Intel Arc A770 / Linux: D3D12 works, VKD3D reports SM 6.8 + DXR 1.1, but WoW still detects sm:dx_5_0 and rt:None

[Olifnoctebrise]

Hello,

I am reporting a reproducible issue with World of Warcraft Retail on Linux.

System:

• GPU: Intel Arc A770 16 GB
• OS: Bazzite KDE
• Launcher: Lutris
• Runner: latest GE-Proton
• API forced in WoW: D3D12

Problem:
World of Warcraft launches successfully in D3D12, but ray tracing remains unavailable in-game (checkbox greyed out).

Important detail:
On the same machine, under Windows, ray tracing works correctly in WoW.
So the GPU and the game do support RT in general on this hardware.

What I observed on Linux:

• WoW successfully creates a D3D12 device
• VKD3D log reports Shader Model 6.6/6.7/6.8 and DXR 1.1 enabled
• but WoW still detects:
  • sm:dx_5_0
  • rt:None

This suggests that D3D12 is working, and VKD3D reports DXR capabilities, but WoW itself still falls back to a lower feature/shader model for capability detection.

Relevant WoW gx.log excerpts:
Force API D3D12
Adapter 0: "Intel(R) Arc(tm) A770 Graphics (DG2)" 16GB ... dx11:false dx12:true
GpuInfo: sm:dx_5_0, rt:None, vrs:2, bary:0, mesh:1 pull:1
D3d12 Device Create Successful
Using shader family dx_5_0

Relevant VKD3D log excerpts:
VKD3D_CONFIG='dxr'
d3d12_device_caps_init_shader_model: Enabling support for SM 6.6.
d3d12_device_caps_init_shader_model: Enabling support for SM 6.7.
d3d12_device_caps_init_shader_model: Enabling support for SM 6.8.
d3d12_device_determine_ray_tracing_tier: DXR support enabled.
d3d12_device_determine_ray_tracing_tier: DXR 1.1 support enabled.

Things already tested:

• WoW forced to D3D12
• latest GE-Proton in Lutris
• no DLL overrides
• no PROTON_USE_WINED3D
• no WINEDLLOVERRIDES
• tested with and without VKD3D_CONFIG=dxr
• reset WoW config/cache (WTF and Cache renamed)
• D3D12 path works consistently
• issue persists

Expected behavior:
If VKD3D exposes SM 6.x and DXR 1.1 correctly, WoW should detect ray tracing support and enable the RT option.

Actual behavior:
WoW launches in D3D12, but still reports sm:dx_5_0 and rt:None, and ray tracing stays disabled.

[gx.log]
Force API D3D12
Adapter 0: "Intel(R) Arc(tm) A770 Graphics (DG2)" 16GB family:DG2 type:Discrete location:0 driver_date:13-Mar-2026 driver_ver:32.0.65535.65535 vendor:0x8086 device:0x56a0 dx11:false dx12:true
GpuInfo: sm:dx_5_0, rt:None, vrs:2, bary:0, mesh:1 pull:1
D3d12 Device Create Successful
Using shader family dx_5_0

[vkd3d-wow.log]
VKD3D_CONFIG='dxr'
d3d12_device_caps_init_shader_model: Enabling support for SM 6.6.
d3d12_device_caps_init_shader_model: Enabling support for SM 6.7.
d3d12_device_caps_init_shader_model: Enabling support for SM 6.8.
d3d12_device_determine_ray_tracing_tier: DXR support enabled.
d3d12_device_determine_ray_tracing_tier: DXR 1.1 support enabled.

Thanks for help !

[doitsujin]

Game probably checks for more than just RT support, and I don't think we can expose FL12_2 on Alchemist due to missing features.

Can always try VKD3D_FEATURE_LEVEL=12_2, but there's a chance that it just blows up.

[Blisto91]

Still missing a bit for anv to be able to report feature level 12_2 out of the box via vkd3d-proton yea. If that is indeed the issue.
See https://gitlab.freedesktop.org/mesa/mesa/-/issues/12425