Add initial legacy configuration

nixos-modules/hardware/thinkpad-x1-gen9.nix

@@ -0,0 +1,42 @@
+{
+  lib,
+  pkgs,
+  modulesPath,
+  hardwareModules,
+  pkgFccUnlock,
+  ...
+}:
+{
+
+  imports = with hardwareModules; [
+    (modulesPath + "/installer/scan/not-detected.nix")
+    hardwareModules.lenovo-thinkpad-x1-9th-gen
+  ];
+
+  boot.initrd.availableKernelModules = [
+    "xhci_pci"
+    "thunderbolt"
+    "nvme"
+    "usb_storage"
+    "sd_mod"
+    "ahci"
+    "usbhid"
+  ];
+  boot.kernelModules = [ "kvm-intel" ];
+
+  boot.initrd.kernelModules = [ "dm-snapshot" ]; # TODO: This should be moved to defaults
+
+  environment.systemPackages = with pkgs; [
+    modemmanager
+    libmbim
+  ];
+
+  environment.etc."ModemManager/fcc-unlock.d/1eac:1001" = {
+    source = "${pkgFccUnlock}/bin/fcc-unlock";
+  };
+
+  # CPU Configuration
+  hardware.cpu.intel.updateMicrocode = true;
+  services.throttled.enable = true;
+  powerManagement.cpuFreqGovernor = lib.mkDefault "performance";
+}