diff --git a/nixos/configuration.nix b/nixos/configuration.nix
index dbba0e7..af6b0f3 100644
--- a/nixos/configuration.nix
+++ b/nixos/configuration.nix
@@ -20,7 +20,7 @@ in
   services.davfs2.enable = true;
 
   # try newer kernels
-  #boot.kernelPackages = pkgs.linuxPackages_latest;
+  boot.kernelPackages = pkgs.linuxPackages_latest;
 
   # use old kernel because 5.4 and 5.5 might be buggy with intel graphics
   #boot.kernelPackages = pkgs.linuxPackages_4_19;
@@ -42,16 +42,6 @@ in
     };
   boot.kernel.sysctl."vm.swappiness" = 9;
 
-  # powermanagement
-  services.tlp =
-    {
-      enable = false;
-      settings = {
-        "SATA_LINKPWR_ON_BAT" = "medium_power";
-        "SATA_LINKPWR_ON_AC" = "max_performance";
-      };
-    };
-
   # Use the systemd-boot EFI boot loader.
   boot.loader.systemd-boot.enable = true;
   boot.loader.efi.canTouchEfiVariables = true;
diff --git a/nixos/hardware-configuration.nix b/nixos/hardware-configuration.nix
index dd7f080..77fed4a 100644
--- a/nixos/hardware-configuration.nix
+++ b/nixos/hardware-configuration.nix
@@ -11,7 +11,7 @@ in
       (
         builtins.fetchGit {
           url = "https://github.com/NixOS/nixos-hardware";
-          rev = "7883883d135ce5b7eae5dce4bfa12262b85c1c46";
+          rev = "a4bc66709604ab78abc575b60baa6d23ae027a59";
         } + "/lenovo/thinkpad/t440s"
       )
     ];