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My NixOS systems configurations.
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thinkpad-x1g9.nix (3055B)

      1 { config, pkgs, ... }:
      2 {
      3   # NixOS options
      4   boot = {
      5     blacklistedKernelModules = [
      6       "sierra_net" # sierra wireless modules
      7       "cdc_mbim" # modem mobile broadband modules
      8       "cdc_ncm" # similar
      9     ];
     10     extraModprobeConfig = ''
     11       options snd_hda_intel power_save=1
     12     '';
     13     initrd = {
     14       availableKernelModules = [
     15         "nvme" # required for nvme disks
     16         "thunderbolt" # required for thunderbolt (dock, ...)
     17         "dm-mod"
     18         "cryptd" # required for encryption
     19         "ahci" # sata controller, might not be needed
     20         "xhci_pci" # usb controller related
     21         "usb_storage" # usb storage related
     22         "sd_mod" # block device related
     23         "sdhci_pci" # block device related as well
     24         "aesni-intel" # advanced encryption for intel
     25       ];
     26     };
     27     loader.efi.canTouchEfiVariables = true;
     28   };
     29   hardware = {
     30     enableAllFirmware = true;
     31     trackpoint.enable = false;
     32     cpu.intel.updateMicrocode = true;
     33     opengl.extraPackages = with pkgs; [ vaapiIntel libvdpau-va-gl vaapiVdpau intel-ocl intel-media-driver ];
     34   };
     35   services = {
     36     hardware.bolt.enable = true;
     37     # throttled.enable = true; # might not be needed
     38     tlp = {
     39       # FIXME: to disable
     40       enable = false;
     41       settings = {
     42         # Charge threshold
     43         # If the battery is used somewhat frequently,
     44         # set the start threshold at around 85% and stop at 90%. This
     45         # will still give a good lifespan benefit over keeping the
     46         # battery charged to 100%.
     47         START_CHARGE_THRESH_BAT0 = 75;
     48         STOP_CHARGE_THRESH_BAT0 = 80;
     49         # CPU optimizations
     50         "CPU_SCALING_GOVERNOR_ON_AC" = "performance";
     51         "CPU_SCALING_GOVERNOR_ON_BAT" = "powersave";
     52         "PLATFORM_PROFILE_ON_AC" = "balanced"; # or performance ?
     53         "PLATFORM_PROFILE_ON_BAT" = "low-power";
     54         "CPU_MIN_PERF_ON_AC" = 0;
     55         "CPU_MAX_PERF_ON_AC" = 100;
     56         "CPU_MIN_PERF_ON_BAT" = 0;
     57         "CPU_MAX_PERF_ON_BAT" = 75;
     58         # DEVICES (wifi, ..)
     59         "DEVICES_TO_DISABLE_ON_STARTUP" = "";
     60         "DEVICES_TO_ENABLE_ON_AC" = "bluetooth wifi wwan";
     61         "DEVICES_TO_DISABLE_ON_BAT" = "";
     62         # Network management
     63         "DEVICES_TO_DISABLE_ON_LAN_CONNECT" = "wifi";
     64         "DEVICES_TO_DISABLE_ON_WIFI_CONNECT" = "";
     65         "DEVICES_TO_DISABLE_ON_WWAN_CONNECT" = "";
     66         "DEVICES_TO_ENABLE_ON_LAN_DISCONNECT" = "wifi";
     67         "DEVICES_TO_ENABLE_ON_WIFI_DISCONNECT" = "";
     68         "DEVICES_TO_ENABLE_ON_WWAN_DISCONNECT" = "";
     69         # Docking
     70         "DEVICES_TO_DISABLE_ON_DOCK" = "wifi";
     71         "DEVICES_TO_ENABLE_ON_UNDOCK" = "wifi";
     72         # Make sure it uses the right hard drive
     73         "DISK_DEVICES" = "nvme0n1p1";
     74       };
     75     };
     76     udev.extraRules = ''
     77       # Rules for Lenovo Thinkpad WS Dock
     78       ACTION=="add", SUBSYSTEM=="thunderbolt", ATTR{authorized}=="0", ATTR{authorized}="1"
     79       ACTION=="add", SUBSYSTEM=="backlight", KERNEL=="intel_backlight", MODE="0666", RUN+="${pkgs.coreutils}/bin/chmod a+w /sys/class/backlight/%k/brightness"
     80     '';
     81   };
     82 }