GPU Temp: Added voluntary opt-in for Nvidia GPU - avoid draining battery on dual gpus laptop.

Assets/Translations/en.json

@@ -2088,6 +2088,10 @@
       "gpu-section": {
         "label": "GPU temperature"
       },
+      "enable-nvidia-gpu": {
+        "label": "Enable NVIDIA GPU monitoring",
+        "description": "Warning: This will wake up your NVIDIA GPU, which may significantly impact battery life on laptops with hybrid graphics."
+      },
       "highlight-colors-section": {
         "label": "Highlight colors"
       },

Assets/settings-default.json

@@ -248,6 +248,7 @@
     "cpuPollingInterval": 3000,
     "tempPollingInterval": 3000,
     "gpuPollingInterval": 3000,
+    "enableNvidiaGpu": false,
     "memPollingInterval": 3000,
     "diskPollingInterval": 3000,
     "networkPollingInterval": 3000,

Commons/Settings.qml

@@ -434,6 +434,7 @@ Singleton {
       property int cpuPollingInterval: 3000
       property int tempPollingInterval: 3000
       property int gpuPollingInterval: 3000
+      property bool enableNvidiaGpu: false // Opt-in: nvidia-smi wakes dGPU on laptops, draining battery
       property int memPollingInterval: 3000
       property int diskPollingInterval: 3000
       property int networkPollingInterval: 3000

Modules/Panels/Settings/Tabs/SystemMonitorTab.qml

@@ -18,6 +18,15 @@ ColumnLayout {
     description: I18n.tr("settings.system-monitor.general.section.description")
   }
 
+  NToggle {
+    Layout.fillWidth: true
+    Layout.topMargin: Style.marginM
+    label: I18n.tr("settings.system-monitor.enable-nvidia-gpu.label")
+    description: I18n.tr("settings.system-monitor.enable-nvidia-gpu.description")
+    checked: Settings.data.systemMonitor.enableNvidiaGpu
+    onToggled: checked => Settings.data.systemMonitor.enableNvidiaGpu = checked
+  }
+
   // Colors Section
   RowLayout {
     Layout.fillWidth: true

Services/System/SystemStatService.qml

@@ -50,7 +50,8 @@ Singleton {
 
   // GPU temperature detection
   // On dual-GPU systems, we prioritize discrete GPUs over integrated GPUs
-  // Priority: NVIDIA > AMD dGPU > Intel Arc > AMD iGPU
+  // Priority: NVIDIA (opt-in) > AMD dGPU > Intel Arc > AMD iGPU
+  // Note: NVIDIA requires opt-in because nvidia-smi wakes the dGPU on laptops, draining battery
   readonly property var supportedTempGpuSensorNames: ["amdgpu", "xe"]
   property string gpuTempHwmonPath: ""
   property var foundGpuSensors: [] // [{hwmonPath, type, hasDedicatedVram}]
@@ -67,6 +68,29 @@ Singleton {
     gpuTempNameReader.checkNext();
   }
 
+  // Re-run GPU detection when NVIDIA opt-in setting changes
+  Connections {
+    target: Settings.data.systemMonitor
+    function onEnableNvidiaGpuChanged() {
+      Logger.i("SystemStat", "NVIDIA opt-in setting changed, re-detecting GPUs");
+      restartGpuDetection();
+    }
+  }
+
+  function restartGpuDetection() {
+    // Reset GPU state
+    root.gpuAvailable = false;
+    root.gpuType = "";
+    root.gpuTempHwmonPath = "";
+    root.gpuTemp = 0;
+    root.foundGpuSensors = [];
+    root.gpuVramCheckIndex = 0;
+
+    // Restart GPU detection
+    gpuTempNameReader.currentIndex = 0;
+    gpuTempNameReader.checkNext();
+  }
+
   // --------------------------------------------
   // Timer for CPU usage
   Timer {
@@ -295,9 +319,17 @@ Singleton {
 
     function checkNext() {
       if (currentIndex >= 16) {
-        // Finished scanning all hwmon entries, now check for NVIDIA
-        Logger.d("SystemStat", `Found ${root.foundGpuSensors.length} sysfs GPU sensor(s), checking for nvidia-smi`);
-        nvidiaSmiCheck.running = true;
+        // Finished scanning all hwmon entries
+        // Only check nvidia-smi if user has explicitly enabled NVIDIA monitoring (opt-in)
+        // because nvidia-smi wakes up the dGPU on laptops, draining battery
+        if (Settings.data.systemMonitor.enableNvidiaGpu) {
+          Logger.d("SystemStat", `Found ${root.foundGpuSensors.length} sysfs GPU sensor(s), checking nvidia-smi (opt-in enabled)`);
+          nvidiaSmiCheck.running = true;
+        } else {
+          Logger.d("SystemStat", `Found ${root.foundGpuSensors.length} sysfs GPU sensor(s), skipping nvidia-smi (opt-in disabled)`);
+          root.gpuVramCheckIndex = 0;
+          checkNextGpuVram();
+        }
         return;
       }
 
@@ -698,9 +730,9 @@ Singleton {
   // -------------------------------------------------------
   // Function to update GPU temperature
   function updateGpuTemperature() {
-    if (root.gpuType === "nvidia")
-      //nvidiaTempProcess.running = true;
-    {} else if (root.gpuType === "amd" || root.gpuType === "intel") {
+    if (root.gpuType === "nvidia") {
+      nvidiaTempProcess.running = true;
+    } else if (root.gpuType === "amd" || root.gpuType === "intel") {
       gpuTempReader.path = `${root.gpuTempHwmonPath}/temp1_input`;
       gpuTempReader.reload();
     }