split into tower and laptop config

modules/system/locale.nix

@@ -1,6 +1,13 @@
 { config, pkgs, ... }:
 
-{
+{ 
+  console = {
+    earlySetup = true;
+    useXkbConfig = true;
+  };
+
+  services.xserver.xkb.layout = "de";
+
   time.timeZone = "Europe/Berlin";
   i18n.defaultLocale = "de_DE.UTF-8";
   i18n.extraLocaleSettings = {

modules/system/nvidia.nix

@@ -0,0 +1,31 @@
+{config, pkgs, ...}:
+{
+
+   nixpkgs.config.allowUnfree = true;
+
+   services.xserver.videoDrivers = ["nvidia"];
+   hardware.graphics = {
+     enable = true;
+     enable32Bit = true;
+   };
+
+   hardware.nvidia = {
+    modesetting.enable = true;
+
+    # Nvidia power management. Experimental, and can cause sleep/suspend to fail.
+    # Enable this if you have graphical corruption issues or application crashes after waking
+    # up from sleep. This fixes it by saving the entire VRAM memory to /tmp/ instead 
+    # of just the bare essentials.
+    powerManagement.enable = true;
+
+    # Fine-grained power management. Turns off GPU when not in use.
+    # Experimental and only works on modern Nvidia GPUs (Turing or newer).
+    # (requires offloading)
+    powerManagement.finegrained = false;
+
+    open = false;
+    nvidiaSettings = true;
+    package = config.boot.kernelPackages.nvidiaPackages.stable;
+  };
+
+}

modules/system/suspend-and-hibernate.nix

@@ -0,0 +1,37 @@
+{ config, pkgs, ... }: let
+  hibernateEnvironment = {
+    HIBERNATE_SECONDS = "3600";
+    HIBERNATE_LOCK = "/var/run/autohibernate.lock";
+  };
+in {
+  systemd.services."awake-after-suspend-for-a-time" = {
+    description = "Sets up the suspend so that it'll wake for hibernation";
+    wantedBy = [ "suspend.target" ];
+    before = [ "systemd-suspend.service" ];
+    environment = hibernateEnvironment;
+    script = ''
+      curtime=$(date +%s)
+      echo "$curtime $1" >> /tmp/autohibernate.log
+      echo "$curtime" > $HIBERNATE_LOCK
+      ${pkgs.util-linux}/bin/rtcwake -m no -s $HIBERNATE_SECONDS
+    '';
+    serviceConfig.Type = "simple";
+  };
+  systemd.services."hibernate-after-recovery" = {
+    description = "Hibernates after a suspend recovery due to timeout";
+    wantedBy = [ "suspend.target" ];
+    after = [ "systemd-suspend.service" ];
+    environment = hibernateEnvironment;
+    script = ''
+      curtime=$(date +%s)
+      sustime=$(cat $HIBERNATE_LOCK)
+      rm $HIBERNATE_LOCK
+      if [ $(($curtime - $sustime)) -ge $HIBERNATE_SECONDS ] ; then
+        systemctl hibernate
+      else
+        ${pkgs.util-linux}/bin/rtcwake -m no -s 1
+      fi
+    '';
+    serviceConfig.Type = "simple";
+  };
+}