Personal-NixOS-Configuration/configurations/desktop/configuration.nix

# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).

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

{
  imports =
    [ # Include the results of the hardware scan.
      ./hardware-configuration.nix
      ./../../modules/nixos/cspark-single-gpu-passthru/module.nix
      inputs.home-manager.nixosModules.default
    ];

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

  networking.hostName = "cspark-nixos-desktop"; # Define your hostname.

  # Enable networking
  networking.networkmanager.enable = true;
  # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.

  services.xserver = {
    # Enable the X11 windowing system.
    enable = true;

    # Remove/disable xterm, we are using Konsole.
    desktopManager.xterm.enable = false;
    excludePackages = with pkgs; [ xterm ];

    # Enable the SDDM display manager
    displayManager.sddm = {
      enable = true;
      wayland.enable = true;
    };

    # Enable touchpad support (enabled default in most desktopManager).
    # libinput.enable = true;
  };
  # Enable the KDE Plasma Desktop Environment.
  services.desktopManager.plasma6.enable = true;
  environment.plasma6.excludePackages = with pkgs.kdePackages; [ elisa ];

  # GTK themes are not applied in Wayland applications / Window Decorations missing / Cursor looks different
  programs.dconf.enable = true;

  # Enable CUPS to print documents.
  services.printing.enable = true;

  # Enable sound with pipewire.
  sound.enable = true;
  hardware.pulseaudio.enable = false;
  security.rtkit.enable = true;
  services.pipewire = {
    enable = true;
    alsa.enable = true;
    alsa.support32Bit = true;
    pulse.enable = true;
    # If you want to use JACK applications, uncomment this
    jack.enable = true;

    # use the example session manager (no others are packaged yet so this is enabled by default,
    # no need to redefine it in your config for now)
    #media-session.enable = true;
  };

  # My audio interface has issues after coming out from suspend/hibernate, this will reset it to fix it when necessary.

  systemd.services.audiointerface-reset-unbind = {
    description = "Resets audio interface to clear up any issues - de-initialises audio interface before sleeping/hibernating/shutting down";
    wantedBy = [ "suspend.target" "hibernate.target" "hybrid-sleep.target" "shutdown.target" ];
    before = [ "systemd-suspend.service" "systemd-hibernate.service" "systemd-hybrid-sleep.service" "shutdown.target" ];
    path = with pkgs; [ bash coreutils kmod ];
    enable = true;
    serviceConfig = {
      User = "root";
      Group = "root";
    };
    script = "
          # Unbind audio interface
          echo `grep 0a73 /sys/bus/usb/devices/*/idVendor | cut -d '/' -f 6` > /sys/bus/usb/drivers/usb/unbind
          # Remove snd_usb_audio once no longer in use
          while ! modprobe -r snd_usb_audio; do
                sleep 1
  	      done
             ";
  };
  systemd.services.audiointerface-reset-bind = {
    description = "Resets audio interface to clear up any issues - re-initialises audio interface after sleeping/hibernating";
    wantedBy = [ "suspend.target" "hibernate.target" "hybrid-sleep.target" ];
    after = [ "systemd-suspend.service" "systemd-hibernate.service" "systemd-hybrid-sleep.service" ];
    path = with pkgs; [ bash coreutils kmod systemd ];
    enable = true;
    serviceConfig = {
      User = "root";
      Group = "root";
    };
    script = "
          systemctl stop audiointerface-reset-unbind.service
          modprobe snd_usb_audio
  	      # Rebind audio interface
  	      echo `grep 0a73 /sys/bus/usb/devices/*/idVendor | cut -d '/' -f 6` > /sys/bus/usb/drivers/usb/bind
             ";
  };

  # Home Manager Configuration
  home-manager = {
    extraSpecialArgs = { inherit inputs; };
    users = {
      "cspark" = import ./home.nix;
    };
  };

  # Steam Game Platform
  programs.steam = {
    enable = true;
    # remotePlay.openFirewall = true; # Open ports in the firewall for Steam Remote Play
    # dedicatedServer.openFirewall = true; # Open ports in the firewall for Source Dedicated Server
    gamescopeSession.enable = true;
  };

  # Single GPU Passthru Configuration
  cspark-single-gpu-passthru.enable = true;
  cspark-single-gpu-passthru.vmName = "win11";
  cspark-single-gpu-passthru.gpuPCI = "0000:08:00.0";
  cspark-single-gpu-passthru.gpuAudioPCI = "0000:08:00.1";

  # Waydroid Android Emulation
  virtualisation.waydroid.enable = true;

  # List packages installed in system profile. To search, run:
  # $ nix search wget
  environment.systemPackages = with pkgs; [
    nvtopPackages.amd
    wl-clipboard

    cool-retro-term
    libsForQt5.polonium
  ];

  # Set konsole to be default terminal
  environment.sessionVariables = {
    TERM = "konsole";
  };
  environment.variables = {
    TERM = "konsole";
  };

}