feat: nb battery improvement

hosts/nb/configuration.nix

@@ -29,6 +29,7 @@ in {
       ./modules/mcp-global.nix
       ./modules/ollama.nix
       ./modules/qdrant.nix
+      ./modules/battery-brightness.nix
 
       ./cachix.nix
       ./users
@@ -74,7 +75,8 @@ in {
   users.defaultUserShell = pkgs.zsh;
 
   services.fwupd.enable = true;
-  services.irqbalance.enable = true;
+  # Disable irqbalance to save battery (not critical for laptop workloads)
+  services.irqbalance.enable = false;
 
   swapDevices = [ {
     device = "/nix/persist/swapfile";
@@ -87,6 +89,11 @@ in {
     "vm.dirty_ratio" = 10;
     "vm.dirty_background_ratio" = 5;
     "vm.vfs_cache_pressure" = 50;
+    # Battery optimization - increase dirty writeback time to batch writes
+    "vm.dirty_writeback_centisecs" = 3000;  # 30 seconds (default: 500 = 5s)
+    "vm.dirty_expire_centisecs" = 3000;     # 30 seconds (default: 3000)
+    # Enable laptop mode for aggressive disk power management
+    "vm.laptop_mode" = 5;
   };
 
   # nixos cross building qemu
@@ -112,7 +119,7 @@ in {
   };
 
   hardware.bluetooth.enable = true;
-  hardware.bluetooth.powerOnBoot = true;
+  hardware.bluetooth.powerOnBoot = false;  # Save battery - enable manually when needed
   hardware.bluetooth.settings = {
     General = { ControllerMode = "bredr"; };
   };

hosts/nb/hardware-configuration.nix

@@ -20,11 +20,15 @@
   # AMD Ryzen 7 7840U optimizations
   boot.kernelParams = [
     "amd_pstate=active"
+    "amd_pstate.shared_mem=1"
     "amdgpu.dcdebugmask=0x10"
     "amdgpu.dc=1"
+    "amdgpu.ppfeaturemask=0xffffffff"
+    "amdgpu.gpu_recovery=1"
     "snd_hda_intel.power_save=1"
     "transparent_hugepage=madvise"
     "pcie_aspm=force"
+    "nvme.noacpi=1"
   ];
 
   fileSystems."/" = {

hosts/nb/modules/battery-brightness.nix

@@ -0,0 +1,15 @@
+{ config, pkgs, lib, ... }:
+
+{
+  # Udev rules for battery optimizations
+  services.udev.extraRules = ''
+    # Reduce brightness to 40% when switching to battery
+    SUBSYSTEM=="power_supply", ATTR{online}=="0", RUN+="${pkgs.light}/bin/light -S 40"
+
+    # AMD GPU power management - force battery profile when unplugged
+    SUBSYSTEM=="power_supply", ATTR{online}=="0", RUN+="${pkgs.bash}/bin/bash -c 'echo battery > /sys/class/drm/card*/device/power_dpm_force_performance_level'"
+
+    # AMD GPU power management - auto when plugged in
+    SUBSYSTEM=="power_supply", ATTR{online}=="1", RUN+="${pkgs.bash}/bin/bash -c 'echo auto > /sys/class/drm/card*/device/power_dpm_force_performance_level'"
+  '';
+}

hosts/nb/modules/desktop/default.nix

@@ -96,7 +96,8 @@ in {
   services.gnome.gnome-keyring.enable = true;
   services.gvfs.enable = true;
 
-  virtualisation.virtualbox.host.enable = true;
+  # VirtualBox disabled by default to save battery - enable manually if needed
+  # virtualisation.virtualbox.host.enable = true;
   users.extraGroups.vboxusers.members = [ "dominik" ];
 
   fonts.packages = with pkgs; [
@@ -111,7 +112,7 @@ in {
   programs.light.enable = true;
 
   hardware.bluetooth.enable = true;
-  hardware.bluetooth.powerOnBoot = true;
+  hardware.bluetooth.powerOnBoot = false;  # Save battery - enable manually when needed
   hardware.bluetooth.settings = {
     General = { ControllerMode = "bredr"; };
   };
@@ -123,14 +124,52 @@ in {
     CPU_SCALING_GOVERNOR_ON_BAT = "powersave";
 
     CPU_ENERGY_PERF_POLICY_ON_AC = "performance";
-    CPU_ENERGY_PERF_POLICY_ON_BAT = "balance_power";
+    CPU_ENERGY_PERF_POLICY_ON_BAT = "power";
 
     CPU_BOOST_ON_AC = 1;
     CPU_BOOST_ON_BAT = 0;
 
+    CPU_MIN_PERF_ON_AC = 0;
+    CPU_MAX_PERF_ON_AC = 100;
+    CPU_MIN_PERF_ON_BAT = 0;
+    CPU_MAX_PERF_ON_BAT = 30;
+
     RUNTIME_PM_ON_AC = "auto";
     RUNTIME_PM_ON_BAT = "auto";
 
+    # WiFi power saving
+    WIFI_PWR_ON_AC = "off";
+    WIFI_PWR_ON_BAT = "on";
+
+    # Disable wake on LAN on battery
+    WOL_DISABLE = "Y";
+
+    # SATA aggressive link power management
+    SATA_LINKPWR_ON_AC = "med_power_with_dipm";
+    SATA_LINKPWR_ON_BAT = "min_power";
+
+    # PCIe Active State Power Management
+    PCIE_ASPM_ON_AC = "default";
+    PCIE_ASPM_ON_BAT = "powersupersave";
+
+    # USB autosuspend
+    USB_AUTOSUSPEND = 1;
+    USB_EXCLUDE_AUDIO = 1;
+    USB_EXCLUDE_BTUSB = 0;
+    USB_EXCLUDE_PHONE = 0;
+    USB_EXCLUDE_PRINTER = 1;
+    USB_EXCLUDE_WWAN = 0;
+
+    # Audio power saving
+    SOUND_POWER_SAVE_ON_AC = 0;
+    SOUND_POWER_SAVE_ON_BAT = 1;
+    SOUND_POWER_SAVE_CONTROLLER = "Y";
+
+    # Disk idle timeout
+    DISK_IDLE_SECS_ON_AC = 0;
+    DISK_IDLE_SECS_ON_BAT = 2;
+
+    # Battery charge thresholds (Framework 13 recommendation)
     START_CHARGE_THRESH_BAT0 = 60;
     STOP_CHARGE_THRESH_BAT0 = 80;
   };

hosts/nb/modules/development/default.nix

@@ -47,7 +47,10 @@ in {
   virtualisation.docker.enable = true;
 
   virtualisation.libvirtd = {
-    enable = true;                     # Turn on the libvirtd daemon
+    enable = true;
+    # Socket activation - only start when needed to save battery
+    onBoot = "ignore";
+    onShutdown = "shutdown";
     qemu = {
       ovmf = {
         enable   = true;               # Enable OVMF firmware support

hosts/nb/modules/ollama.nix

@@ -7,9 +7,8 @@
     port = 11434;
     openFirewall = false;
     acceleration = "rocm";
-    loadModels = [
+    # Don't preload models - start on-demand to save battery
-      "mxbai-embed-large"
+    loadModels = [ ];
-    ];
   };
 
   # ROCm GPU configuration for AMD Ryzen 7 7840U (gfx1103)

hosts/nb/modules/qdrant.nix

@@ -4,8 +4,9 @@
   services.qdrant = {
     enable = true;
     settings = {
-      storage.performance.max_search_threads = 8;
+      # Reduced thread count for better battery life
-      storage.optimizers.default_segment_number = 4;
+      storage.performance.max_search_threads = 4;
+      storage.optimizers.default_segment_number = 2;
     };
   };
 }

hosts/nb/modules/sway/sway.conf

@@ -302,8 +302,10 @@ exec cryptomator
 exec swayidle \
  before-sleep 'loginctl lock-session $XDG_SESSION_ID' \
  lock 'swaylock -c 252525 -s center -i ~/.wallpaper.png' \
- timeout 300 'swaylock -c 252525 -s center -i ~/.wallpaper.png' \
+ timeout 120 'light -O && light -S 10' \
- timeout 1800 'systemctl suspend'
+ resume 'light -I' \
+ timeout 180 'swaylock -c 252525 -s center -i ~/.wallpaper.png' \
+ timeout 600 'systemctl suspend'
 exec dunst
 #exec --no-startup-id swaybg -c "#000000" -m fill -i ~/.config/wallpaper/wot.jpg
 # exec --no-startup-id gnome-keyring-daemon --start --components=pkcs11,secrets,ssh