{ config, lib, pkgs, ... }:
{

  # Enable OpenGL
  hardware.graphics = {
    enable = true;  
    extraPackages = with pkgs; [ nvidia-vaapi-driver ];
  };

  # Load nvidia driver for Xorg and Wayland
  # boot.extraModulePackages = [ config.boot.kernelPackages.nvidia_x11 ];
  boot.extraModulePackages = [ config.boot.kernelPackages.nvidia_x11_beta ];
  # boot.extraModulePackages = [ config.boot.kernelPackages.nvidia_x11 ];


  boot.loader.systemd-boot.consoleMode = "max";

  boot.kernelParams = [
    # "amdgpu.modeset=0"
    "nvidia-drm.fbdev=1"
    "nvidia-drm.modeset=1"
    "nvidia.NVreg_PreserveVideoMemoryAllocations=1"
    # "amd_iommu=on"
    # "vfio-pci.ids=\"10de:2489,10de:228b\""
    # "nomodeset"
  #  "nvidia_drm.modeset=1"
  ];
  boot.blacklistedKernelModules = [ 
    "i915" 
    "nouveau"
    "amdgpu"
  ];
  services.xserver.videoDrivers = [ "nvidia" ];

  boot.initrd.kernelModules = [
    "nvidia"  
    "nvidia_drm"
  ];  
  hardware.nvidia = {
    modesetting.enable = true;

    # Nvidia power management. Experimental, and can cause sleep/suspend to fail.
    # Enable this if you have graphical corruption issues or application crashes after waking
    # up from sleep. This fixes it by saving the entire VRAM memory to /tmp/ instead 
    # of just the bare essentials.
    powerManagement.enable = false;

    # Fine-grained power management. Turns off GPU when not in use.
    # Experimental and only works on modern Nvidia GPUs (Turing or newer).
    powerManagement.finegrained = false;

    # Use the NVidia open source kernel module (not to be confused with the
    # independent third-party "nouveau" open source driver).
    # Support is limited to the Turing and later architectures. Full list of 
    # supported GPUs is at: 
    # https://github.com/NVIDIA/open-gpu-kernel-modules#compatible-gpus 
    # Only available from driver 515.43.04+
    # Currently alpha-quality/buggy, so false is currently the recommended setting.
    open = false;

    # Enable the Nvidia settings menu,
	  # accessible via `nvidia-settings`.
    nvidiaSettings = true;

    # Optionally, you may need to select the appropriate driver version for your specific GPU.
    package = config.boot.kernelPackages.nvidiaPackages.beta;
    # package = config.boot.kernelPackages.nvidiaPackages.none;
    # package = config.boot.kernelPackages.nvidiaPackages.production;
    
    forceFullCompositionPipeline = true;

    # prime = {
    #   offload = {
    #     enable = true;
    #     enableOffloadCmd = true;
    #   };
    #   reverseSync.enable = false;
    #   # Make sure to use the correct Bus ID values for your system!
    #   # intelBusId = "PCI:0:2:0";
    #   nvidiaBusId = "PCI:01:0:0";
    #   amdgpuBusId = "PCI:50:0:0"; #For AMD GPU
    # };

  };
  users.users.andreas = {
   extraGroups = [ "video" "render" ];
  };
}