nixos-config/modules/nixos/hardware/graphics-nvidia-prime-amd-testing/default.nix

{ config
, lib
, pkgs
, ...
}:
let
  inherit (lib) mkEnableOption mkIf;
  inherit (lib.my-namespace) disabled enabled;

  cfg = config.my-namespace.hardware.graphics-nvidia-prime-amd-testing;
in
{
  options.my-namespace.hardware.graphics-nvidia-prime-amd-testing = {
    enable = mkEnableOption "Enable nvidia";
  };
  config = mkIf cfg.enable {

    # Enable NVIDIA driver for X11 and Wayland
    # without modesetting, x server will be run by nvidia
    services.xserver.videoDrivers = [
      "nvidia"
      # "nvidia-drm"
      # "nvidia-uvm"
      # "nvidia-modeset"
      # "nvidiafb"
      "amdgpu"
      # "modesetting"
    ];

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

    hardware.graphics.enable32Bit = true; # For 32 bit applications

    # Enable Switcheroo
    services.switcherooControl.enable = true;

    # Use Beta Driver Package
    boot.extraModulePackages = [ config.boot.kernelPackages.nvidia_x11_beta ];



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

    # Enable required Kernel Modules
    boot.initrd.kernelModules = [
      "nvidia"
      "nvidia-drm"
      "nvidia-uvm"
      "nvidia-modeset"
      "nvidiafb"
      "amdgpu"
      #   # "i2c-nvidia_gpu"    
    ];


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


    # Blacklist intel and nouveau
    boot.blacklistedKernelModules = [
      # "i915"
      "nouveau"
      # "nvidia"
      # "nvidia-drm"
      # "nvidia-uvm"
      # "nvidiafb"
      # "nvidia_drm"
      # "nvidia_modeset"
    ];

    # Extra blacklist nouveau
    # boot.extraModprobeConfig = ''
    #   blacklist nouveau
    #   options nouveau modeset=0
    # '';

    # services.xserver.config = lib.mkForce ''
    #   Section "ServerLayout"
    #     Identifier "layout"
    #     Screen 0 "amdgpu"
    #     Inactive "nvidia"
    #     Option "AllowNVIDIAGPUScreens"
    #   EndSection

    #   Section "Device"
    #     Identifier "nvidia"
    #     Driver "nvidia"
    #     BusID "PCI:01:0:0"
    #   EndSection

    #   Section "Screen"
    #     Identifier "nvidia"
    #     Device "nvidia"
    #   EndSection

    #   Section "Device"
    #     Identifier "amdgpu"
    #     Driver "amdgpu"
    #     BusID "PCI:50:0:0"
    #   EndSection

    #   Section "Screen"
    #     Identifier "amdgpu"
    #     Device "amdgpu"
    #   EndSection
    # '';

    # Configure NVIDIA driver
    hardware.nvidia = {
    # Modesetting is required.
    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 = true;

    # 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;
    nvidiaPersistenced = true;
    forceFullCompositionPipeline = true;

    prime = {
      offload = {
        enable = true;
        enableOffloadCmd = true;
      };
      # sync.enable=true;
      # reverseSync.enable = false;
      # Make sure to use the correct Bus ID values for your system!
      # intelBusId = "PCI:0:2:0";
      nvidiaBusId = "PCI:1:0:0";
      amdgpuBusId = "PCI:50:0:0"; #For AMD GPU
    };

  };
  # Add user to extra groups
  users.users.andreas = {
    extraGroups = [ "video" "render" ];
  };

};
}