diff --git a/hosts/dell-5590/nixos/configuration.nix b/hosts/dell-5590/nixos/configuration.nix
index 9628c6e..ab542d9 100644
--- a/hosts/dell-5590/nixos/configuration.nix
+++ b/hosts/dell-5590/nixos/configuration.nix
@@ -134,13 +134,8 @@
       isNormalUser = true;
       home = "/home/alexandre";
       description = "alexandre";
-      extraGroups = [ "wheel" "networkmanager" "docker" "libvirtd" "vboxusers" "scanner" "lp" ];
+      extraGroups = [ "wheel" "networkmanager" "docker" "libvirtd" "vboxusers" "scanner" "lp" "plocate" ];
       hashedPassword = "$6$7m77oPQxa$W9YnRLo1X2eqztBHwpoH8diHGkBno5O39AMyL9Qm8y8I6uW63H2Nwx4p239OG5zhOxA8J1lZvHTQ3hKPSP9mT/";
     };
   };
-nix = {
-  package = pkgs.nixfmt;
-  extraOptions = ''experimental-features = nix-command fmt'';
-};
-
 }
diff --git a/hosts/dell-5590/nixos/services.nix b/hosts/dell-5590/nixos/services.nix
index 53e3292..eadd486 100644
--- a/hosts/dell-5590/nixos/services.nix
+++ b/hosts/dell-5590/nixos/services.nix
@@ -30,7 +30,31 @@
     };
 
     ntp.enable = true;
-    tlp.enable = true;
+    tlp = {
+      enable = true;
+      settings = {
+      CPU_SCALING_GOVERNOR_ON_BAT="powersave";
+      CPU_SCALING_GOVERNOR_ON_AC="powersave";
+# The following prevents the battery from charging fully to
+      # preserve lifetime. Run `tlp fullcharge` to temporarily force
+      # full charge.
+      # https://linrunner.de/tlp/faq/battery.html#how-to-choose-good-battery-charge-thresholds
+      START_CHARGE_THRESH_BAT0=40;
+      STOP_CHARGE_THRESH_BAT0=50;
+
+      # 100 being the maximum, limit the speed of my CPU to reduce
+      # heat and increase battery usage:
+      CPU_MAX_PERF_ON_AC=75;
+      CPU_MAX_PERF_ON_BAT=60;
+    };
+};
+    # ADD group mlocate to your user
+    locate = {
+      enable = true;
+      locate = pkgs.plocate;
+      interval = "hourly";
+      localuser = null;
+    };
 
 
     xserver = {
@@ -44,7 +68,7 @@
       };
       xautolock = {
 	enable = true;
-	time = 1;
+	time = 10;
 	locker = "${pkgs.i3lock}/bin/i3lock -i /home/alexandre/images/coffee_time.png";
 	#notifier = "${pkgs.libnotify}/bin/notify-send 'Locking in 10 seconds'";
       };
@@ -64,14 +88,6 @@
   };
 
   nixpkgs.config = {
-
-    #packageOverrides = pkgs: {
-    #  polybar = pkgs.polybar.override {
-    #    i3Support = true;
-    #    pulseSupport = true;
-    #  };
-    #};
-
     allowUnfree = true;
   };
 
diff --git a/hosts/dell-5590/nixpkgs/configs/i3config b/hosts/dell-5590/nixpkgs/configs/i3config
index a0156f6..a254681 100644
--- a/hosts/dell-5590/nixpkgs/configs/i3config
+++ b/hosts/dell-5590/nixpkgs/configs/i3config
@@ -129,7 +129,7 @@ bar {
 bindsym $mod+$ALT+l exec i3lock -ti ~/images/coffee_time.png
 
 # blocage automatique de l'ecran en cas d'inactivité
-exec xautolock -detectsleep -time 120 -corners -locker 'i3lock -ti ~/images/coffee_time.png'
+exec xautolock -detectsleep -time 1200 -corners -locker 'i3lock -ti ~/images/coffee_time.png'
 
 # Capture d'ecran
 bindsym Print exec scrot -u '%Y-%m-%d-%T_$wx$h_scrot.png' -e 'mv $f ~/Screenshots/'
@@ -148,3 +148,6 @@ exec --no-startup-id i3-msg 'workspace $ws1; exec alacritty;'
 exec --no-startup-id i3-msg 'workspace $ws1; exec ferdi;' 
 exec --no-startup-id i3-msg 'workspace $ws2; exec thunderbird;'
 exec --no-startup-id i3-msg 'workspace $ws3; exec firefox;' 
+
+exec --no-startup-id xset s off
+exec --no-startup-id xset -dpms