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

with lib;
{
  boot = {
    initrd.availableKernelModules = [ "nvme" "xhci_pci" "ahci" "usbhid" "usb_storage" "sd_mod" ];
    kernelModules = [ "kvm-amd" ];
    extraModulePackages = [ ];
    loader = {
      systemd-boot.enable = true;
      efi.canTouchEfiVariables = true;
      # why not ensure we can memtest workstatons easily?
      grub.memtest86.enable = true;

    };
  };

  # set xserver videodrivers for NVIDIA 4080 gpu
  services.xserver.videoDrivers = [ "nvidia" ];


  # ref: https://nixos.wiki/wiki/Nvidia
  # Enable OpenGL
  hardware.opengl = {
    enable = true;
    driSupport = true;
    driSupport32Bit = true;
  };

  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 = 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.stable;
  };

  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";

}