nixos/hosts/snowhawk/hardware-configuration.nix

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

{
  imports = [ (modulesPath + "/installer/scan/not-detected.nix") ];

  boot.initrd.availableKernelModules = [ "nvme" "xhci_pci" "ahci" "usb_storage" "usbhid" "sd_mod" "sr_mod" ];
  boot.initrd.kernelModules = [ ];
  boot.kernelModules = [ "kvm-amd" ];
  boot.extraModulePackages = [ ];

  fileSystems."/" = {
    device = "/dev/disk/by-uuid/8c377115-06bb-488e-a531-c668dac127f6";
    fsType = "ext4";
  };

  fileSystems."/boot" = {
    device = "/dev/disk/by-uuid/1A0A-CEB2";
    fsType = "vfat";
  };

  fileSystems."/data" = {
    device = "/dev/disk/by-uuid/00a7093a-49ee-41e4-baec-99d8a322a530";
    fsType = "ext4";
  };

  # Enable OpenGL
  hardware.graphics = {
    enable = true;
    enable32Bit = true;
  };

  # Load nvidia driver for Xorg and Wayland
  services.xserver.videoDrivers = lib.mkDefault [ "nvidia" ];
  services.xserver.dpi = lib.mkDefault 96;
  # services.xserver.xrandrHeads = [
  #   { output = "HDMI-0"; }
  #   {
  #     output = "DP-0";
  #     primary = true;
  #     monitorConfig = ''
  #       Option "Position" "1920 0"
  #     '';
  #   }
  # ];


  systemd.user.services.screenlayout = {
    script = ''
      ${pkgs.xorg.xrandr}/bin/xrandr \
            --output DP-0 --primary --mode 1920x1080 --pos 1922x0 --rotate normal \
            --output HDMI-0 --mode 1920x1080 --pos 0x0 --rotate normal \
            --output DP-1 --off \
            --output DP-2 --off \
            --output DP-3 --off \
            --output DP-4 --off \
            --output DP-5 --off \
            --output HDMI-1 --off
    '';
    wantedBy = [ "graphical-session.target" ];
    partOf = [ "graphical-session.target" ];
  };


  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;

    forceFullCompositionPipeline = true;

    # Optionally, you may need to select the appropriate driver version for your specific GPU.
    package = config.boot.kernelPackages.nvidiaPackages.beta;
  };


  swapDevices = [ ];

  # Bootloader.
  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;

  # Enable networking
  networking.networkmanager.enable = true;

  networking.hostName = "snowhawk";
  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
  # (the default) this is the recommended approach. When using systemd-networkd it's
  # still possible to use this option, but it's recommended to use it in conjunction
  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
  networking.useDHCP = lib.mkDefault true;
  # networking.interfaces.enp7s0.useDHCP = lib.mkDefault true;
  # networking.interfaces.wlp6s0.useDHCP = lib.mkDefault true;

  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
  hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
}