Fix screenshare portals linux

electron/app/flags.ts

@@ -3,7 +3,6 @@ import { readDesktopSettings } from '../desktop-settings';
 
 export function configureAppFlags(): void {
   linuxSpecificFlags();
-  audioFlags();
   networkFlags();
   setupGpuEncodingFlags();
   chromiumFlags();
@@ -15,21 +14,40 @@ function chromiumFlags(): void {
 
   // Suppress Autofill devtools errors
   app.commandLine.appendSwitch('disable-features', 'Autofill,AutofillAssistant,AutofillServerCommunication');
-}
 
-function audioFlags(): void {
+  // Collect all enabled features into a single switch to avoid later calls overwriting earlier ones
+  const enabledFeatures: string[] = [];
+
   if (process.platform === 'linux') {
-    // Use the new PipeWire-based audio pipeline on Linux for better screen share audio capture support
-    app.commandLine.appendSwitch('enable-features', 'AudioServiceOutOfProcess');
+    // PipeWire-based audio pipeline for screen share audio capture
+    enabledFeatures.push('AudioServiceOutOfProcess');
+    // PipeWire-based screen capture so the xdg-desktop-portal system picker works
+    enabledFeatures.push('WebRTCPipeWireCapturer');
+  }
+
+  const desktopSettings = readDesktopSettings();
+
+  if (process.platform === 'linux' && desktopSettings.vaapiVideoEncode) {
+    enabledFeatures.push('VaapiVideoEncode');
+  }
+
+  if (enabledFeatures.length > 0) {
+    app.commandLine.appendSwitch('enable-features', enabledFeatures.join(','));
   }
 }
 
 function linuxSpecificFlags(): void {
-  // Disable sandbox on Linux to avoid SUID / /tmp shared-memory issues
-  if (process.platform === 'linux') {
-    app.commandLine.appendSwitch('no-sandbox');
-    app.commandLine.appendSwitch('disable-dev-shm-usage');
+  if (process.platform !== 'linux') {
+    return;
   }
+
+  // Disable sandbox on Linux to avoid SUID / /tmp shared-memory issues
+  app.commandLine.appendSwitch('no-sandbox');
+  app.commandLine.appendSwitch('disable-dev-shm-usage');
+
+  // Auto-detect Wayland vs X11 so the xdg-desktop-portal system picker
+  // works for screen capture on Wayland compositors
+  app.commandLine.appendSwitch('ozone-platform-hint', 'auto');
 }
 
 function networkFlags(): void {
@@ -46,11 +64,6 @@ function setupGpuEncodingFlags(): void {
     app.disableHardwareAcceleration();
   }
 
-  if (process.platform === 'linux' && desktopSettings.vaapiVideoEncode) {
-    // Enable VA-API hardware video encoding on Linux
-    app.commandLine.appendSwitch('enable-features', 'VaapiVideoEncode');
-  }
-
   app.commandLine.appendSwitch('enable-gpu-rasterization');
   app.commandLine.appendSwitch('enable-zero-copy');
   app.commandLine.appendSwitch('enable-native-gpu-memory-buffers');