Intel Graphics

Video acceleration

To enable hardware (GPU) accelerated video decoding and encoding you need to add additional entries in hardware.opengl.extraPackages (see "accelerated video playback").

Iris

On nixos-unstable the new Gallium iris driver is enabled by default. For nixos-20.03 you can use the following in your system configuration:

  config = {
    environment.variables = {
      MESA_LOADER_DRIVER_OVERRIDE = "iris";
    };
    hardware.opengl.package = (pkgs.mesa.override {
      galliumDrivers = [ "nouveau" "virgl" "swrast" "iris" ];
    }).drivers;
  };

(See this GitHub thread for context and explanation. nouveau is included to trigger the gallium-xa build, which is currently required because the nix derivation expects to copy the gallium-xa pkg-config files into place. Without swrast and/or virgl, it complains about needing softpipe/llvmpipe to build the nine state tracker.)