nix/hosts/laptop/modules/nvidia.nix

{ ... }:
{
    hardware.graphics.enable = true;
    services.xserver.videoDrivers = ["amdgpu" "nvidia"];
    # services.xserver.videoDrivers = ["nvidia" "amdgpu"];
    hardware.nvidia = {
        modesetting.enable = true;

        # Experimental nvidia power management
        powerManagement.enable = false;

        # Experimentally turn off Nvidia GPU when not in use
        powerManagement.finegrained = false;

        open = false; # Open source module is still very much beta

        nvidiaSettings = true;

        # Configure dual-gpu offloading
        prime = {
            amdgpuBusId = "PCI:4:0:0";
            nvidiaBusId = "PCI:1:0:0";

            offload = {
                enable = true;
                enableOffloadCmd = true;
            };
        };
    };
}