{ config, pkgs, ... }:
{
###### intel igpu ########

hardware.opengl.enable = true;
#hardware.opengl.extraPackages = [ pkgs.mesa.drivers ];  
hardware.nvidia.nvidiaSettings = false;
hardware.nvidia.modesetting.enable = true;  
hardware.nvidia.package = config.boot.kernelPackages.nvidiaPackages.stable;

##### nvidia offloading ########

 services.xserver.videoDrivers = [ "nvidia" ];

  hardware.nvidia.prime = {
    sync.enable = true;
    
    # Bus ID of the NVIDIA GPU. You can find it using lspci, either under 3D or VGA
    nvidiaBusId = "PCI:1:0:0";

    # Bus ID of the Intel GPU. You can find it using lspci, either under 3D or VGA
    intelBusId = "PCI:0:2:0";
  };
}