grimm-nixos-laptop/modules/xserver.nix

{
  # Enable the X11 windowing system.
  services.xserver = {
    enable = true;
    videoDrivers = [ "nouveau" "fbdev" "modesetting" ];
    #    videoDrivers = [ "nouveau" ];
    displayManager = {
      #      lightdm.enable = true;
      sddm = {
        enable = true;
        wayland.enable = true;
      };
      defaultSession = "sway";
    };
    desktopManager = {
      #      xfce.enable = true;
    };
  };

  services.desktopManager = {
    plasma6.enable = true;
    #      xfce.enable = true;
  };

  # Enable touchpad support (enabled default in most desktopManager).
  # services.xserver.libinput.enable = true;
}