Possible fix for QS crash on single monitor wake

Commons/Icons.qml

@@ -0,0 +1,42 @@
+pragma Singleton
+
+import QtQuick
+import Quickshell
+
+Singleton {
+  id: icons
+
+  function iconFromName(iconName, fallbackName) {
+    const fallback = fallbackName || "application-x-executable"
+    try {
+      if (iconName && typeof Quickshell !== 'undefined' && Quickshell.iconPath) {
+        const p = Quickshell.iconPath(iconName, fallback)
+        if (p && p !== "") return p
+      }
+    } catch (e) {
+      // ignore and fall back
+    }
+    try {
+      return Quickshell.iconPath ? (Quickshell.iconPath(fallback, true) || "") : ""
+    } catch (e2) {
+      return ""
+    }
+  }
+
+  // Resolve icon path for a DesktopEntries appId - safe on missing entries
+  function iconForAppId(appId, fallbackName) {
+    const fallback = fallbackName || "application-x-executable"
+    if (!appId) return iconFromName(fallback, fallback)
+    try {
+      if (typeof DesktopEntries === 'undefined' || !DesktopEntries.byId)
+        return iconFromName(fallback, fallback)
+      const entry = DesktopEntries.byId(appId)
+      const name = entry && entry.icon ? entry.icon : ""
+      return iconFromName(name || fallback, fallback)
+    } catch (e) {
+      return iconFromName(fallback, fallback)
+    }
+  }
+}
+
+

Modules/Background/ScreenCorners.qml

@@ -43,9 +43,9 @@ Loader {
       }
 
       margins {
-        top: (Settings.data.bar.monitors.includes(modelData.name) || (Settings.data.bar.monitors.length === 0))
+        top: ((modelData && Settings.data.bar.monitors.includes(modelData.name)) || (Settings.data.bar.monitors.length === 0))
              && Settings.data.bar.position === "top" ? Math.floor(Style.barHeight * scaling) : 0
-        bottom: (Settings.data.bar.monitors.includes(modelData.name) || (Settings.data.bar.monitors.length === 0))
+        bottom: ((modelData && Settings.data.bar.monitors.includes(modelData.name)) || (Settings.data.bar.monitors.length === 0))
                 && Settings.data.bar.position === "bottom" ? Math.floor(Style.barHeight * scaling) : 0
       }
 

Modules/Bar/ActiveWindow.qml

@@ -49,13 +49,7 @@ Row {
     if (!focusedWindow || !focusedWindow.appId)
       return ""
 
-    // DesktopEntries.byId may return null for unknown apps; guard accordingly
-    if (typeof DesktopEntries === 'undefined' || !DesktopEntries.byId)
-      return ""
-    const entry = DesktopEntries.byId(focusedWindow.appId)
-    const iconName = entry && entry.icon ? entry.icon : ""
-    const iconPath = iconName ? Quickshell.iconPath(iconName) : ""
-    return iconPath || ""
+    return Icons.iconForAppId(focusedWindow.appId)
   }
 
   //  A hidden text element to safely measure the full title width

Modules/Bar/Brightness.qml

@@ -10,24 +10,30 @@ Item {
 
   width: pill.width
   height: pill.height
-  visible: Settings.data.bar.showBrightness && firstBrightnessReceived
+  visible: Settings.data.bar.showBrightness && firstBrightnessReceived && getMonitor() !== null
 
   // Used to avoid opening the pill on Quickshell startup
   property bool firstBrightnessReceived: false
 
+  function getMonitor() {
+    return BrightnessService.getMonitorForScreen(screen) || null
+  }
+
   function getIcon() {
-    var brightness = BrightnessService.getMonitorForScreen(screen).brightness
-    return brightness <= 0 ? "brightness_1" : brightness < 0.33 ? "brightness_low" : brightness
-                                                                  < 0.66 ? "brightness_medium" : "brightness_high"
+    var monitor = getMonitor()
+    var brightness = monitor ? monitor.brightness : 0
+    return brightness <= 0 ? "brightness_1" : brightness < 0.33 ? "brightness_low" : brightness < 0.66 ? "brightness_medium" : "brightness_high"
   }
 
   // Connection used to open the pill when brightness changes
   Connections {
-    target: BrightnessService.getMonitorForScreen(screen)
+    target: getMonitor()
+    ignoreUnknownSignals: true
     function onBrightnessUpdated() {
       Logger.log("Bar-Brightness", "OnBrightnessUpdated")
-
-      var monitor = BrightnessService.getMonitorForScreen(screen)
+      var monitor = getMonitor()
+      if (!monitor)
+        return
       var currentBrightness = monitor.brightness
 
       // Ignore if this is the first time or if brightness hasn't actually changed
@@ -52,15 +58,19 @@ Item {
     iconCircleColor: Color.mPrimary
     collapsedIconColor: Color.mOnSurface
     autoHide: false // Important to be false so we can hover as long as we want
-    text: Math.round(BrightnessService.getMonitorForScreen(screen).brightness * 100) + "%"
+    text: {
+      var monitor = getMonitor()
+      return monitor ? (Math.round(monitor.brightness * 100) + "%") : ""
+    }
     tooltipText: {
-      var monitor = BrightnessService.getMonitorForScreen(screen)
-      return "Brightness: " + Math.round(monitor.brightness * 100) + "%\nMethod: " + monitor.method
-          + "\nLeft click for advanced settings.\nScroll up/down to change brightness."
+      var monitor = getMonitor()
+      if (!monitor) return ""
+      return "Brightness: " + Math.round(monitor.brightness * 100) + "%\nMethod: " + monitor.method + "\nLeft click for advanced settings.\nScroll up/down to change brightness."
     }
 
     onWheel: function (angle) {
-      var monitor = BrightnessService.getMonitorForScreen(screen)
+      var monitor = getMonitor()
+      if (!monitor) return
       if (angle > 0) {
         monitor.increaseBrightness()
       } else if (angle < 0) {

Modules/Dock/Dock.qml

@@ -159,8 +159,7 @@ Loader {
             function getAppIcon(toplevel: Toplevel): string {
               if (!toplevel)
                 return ""
-              let icon = Quickshell.iconPath(DesktopEntries.byId(toplevel.appId?.toLowerCase()).icon)
-              return icon || Quickshell.iconPath("application-x-executable", true)
+              return Icons.iconForAppId(toplevel.appId?.toLowerCase())
             }
 
             Row {

Modules/Launcher/Launcher.qml

@@ -418,7 +418,7 @@ NPanel {
                   anchors.fill: parent
                   anchors.margins: Style.marginXS * scaling
                   asynchronous: true
-                  source: modelData.isCalculator ? "" : modelData.isClipboard ? "" : modelData.isCommand ? modelData.icon : (modelData.icon ? Quickshell.iconPath(modelData.icon, "application-x-executable") : "")
+                  source: modelData.isCalculator ? "" : modelData.isClipboard ? "" : modelData.isCommand ? modelData.icon : Icons.iconFromName(modelData.icon, "application-x-executable")
                   visible: (modelData.isCalculator || modelData.isClipboard || modelData.isCommand || parent.iconLoaded)
                            && modelData.type !== 'image'
                 }

Modules/SettingsPanel/Tabs/BarTab.qml

@@ -134,7 +134,7 @@ ColumnLayout {
 
         NToggle {
           label: "Show Battery Percentage"
-          description: "Show battery percentage at all times (otherwise only when charging or low)."
+          description: "Show battery percentage at all times."
           checked: Settings.data.bar.alwaysShowBatteryPercentage
           onToggled: checked => {
                        Settings.data.bar.alwaysShowBatteryPercentage = checked