Intel graphics acceleration architecturally broken for non-Ubuntu systems (original) (raw)
Windows build number:
10.0.22621.0
Your Distribution version:
any non-Debian / non-Ubuntu
Your WSL versions:
WSL version: 1.1.3.0
Kernel version: 5.15.90.1
WSLg version: 1.0.49
MSRDC version: 1.2.3770
Direct3D version: 1.608.2-61064218
DXCore version: 10.0.25131.1002-220531-1700.rs-onecore-base2-hyp
Windows version: 10.0.22621.1344
Steps to reproduce:
WSLg graphics (and video) acceleration is fundamentally and architecturally broken for Intel GPUs on any distribution that is not part of the Debian or Ubuntu world.
In other words, Intel graphics acceleration will not work for WSLg on affected distributions.
To reproduce on any affected distribution,
- pick some hardware which has Intel GPU hardware
- recent enough Intel drivers supporting WSLg in general, on Ubuntu
- open a WSL2 prompt on the affected distribution (assuming that a full Mesa stack including d3d12 DRI driver is installed)
- run
MESA_D3D12_DEFAULT_ADAPTER_NAME=intel glxinfo -B | grep -oP '(?<=Device: )(.+)$'
//exp: D3D12 (Intel(R) UHD Graphics) (0xffffffff)
//act: llvmpipe (LLVM 15.0.7, 256 bits) (0xffffffff)
Affected are, amongst others,
- Fedora Linux (https://apps.microsoft.com/store/detail/fedora-remix-for-wsl, https://github.com/WhitewaterFoundry/Fedora-Remix-for-WSL)
- OpenSUSE Tumbleweed (https://github.com/openSUSE/WSL-DistroLauncher, https://apps.microsoft.com/store/detail/opensuse-tumbleweed)
- Arch Linux (https://apps.microsoft.com/store/detail/arch-wsl, https://github.com/VsTechDev/Arch-WSL)
but also any other custom-build or custom-loaded distribution which does not originate from the Debian world.
WSL logs:
No response
WSL dumps:
No response
Expected behavior:
run MESA_D3D12_DEFAULT_ADAPTER_NAME=intel glxinfo -B | grep -oP '(?<=Device: )(.+)$'
//exp: D3D12 (Intel(R) UHD Graphics) (0xffffffff)
Actual behavior:
run MESA_D3D12_DEFAULT_ADAPTER_NAME=intel glxinfo -B | grep -oP '(?<=Device: )(.+)$'
//act: llvmpipe (LLVM 15.0.7, 256 bits) (0xffffffff)