Good question. No idea, actually. Is there any GPGPU framework that works on X/Linux without being tied to a bitrotten video driver not fully supporting modern XRandR, I wonder.

cc @oxij

Hm. It looks like Intel VA-API somewhat supports Wayland, I wonder if that means they are also fine with modesetting intel/libva#53. And Beignet claims to work without X11 if desired.

If you have a Nix expression that uses OpenCL on Intel around — I run a Intel+Nvidia i965+nouveau modesetting system, so I can check if that code works.

People doing GPGPU will probably know enough to add videoDriver = "intel"; into their configs.

@volth thanks. It seems to look for OpenCL configuration in a place defined relative to libGL. Adding beignet to the packages for opengl-driver buildEnv seems to help.

Using default runtime: v4.0.30319
Id:0 Name:Intel(R) HD Graphics IvyBridge M GT2
    PreferredGroupSizeMultiple:16 ComputeUnits:16 ClockFrequency:1000
    MaxConstantBufferSize:134217728 MaxConstantArgs:8 MaxMemAllocSize:1610612736

@vcunat by now I mostly collect information for release notes.

cl_get_gt_device(): error, unknown device: 3e94

@volth Coffee Lake (but not including CL-R) is supported only in their HEAD, see intel/beignet@7e181af

Should we move nixpkgs ahead of the release version? It's not clear if they will make another, since it's more or less dead.

@7c6f434c I'm not sure that there is any relationship between the (Intel) display and OCL drivers - I didn't see any mention of a GPU driver requirement on Intel's website, nor in the READMEs in their github repos.

I tested disabling modesetting and using the fbdev and vesa drivers on my machine, in turn, and waifu2x-converter-cpp --force-OpenCL still ran fine with both, even though the vesa driver doesn't actually work for me. This is using intel-ocl though, since I'm on CL-R.

@volth could you test the same with beignet?