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');

electron/ipc/system.ts

@@ -204,26 +204,32 @@ export function setupSystemHandlers(): void {
   });
 
   ipcMain.handle('get-sources', async () => {
-    const thumbnailSize = { width: 240, height: 150 };
-    const [screenSources, windowSources] = await Promise.all([
-      desktopCapturer.getSources({
-        types: ['screen'],
-        thumbnailSize
-      }),
-      desktopCapturer.getSources({
-        types: ['window'],
-        thumbnailSize,
-        fetchWindowIcons: true
-      })
-    ]);
-    const sources = [...screenSources, ...windowSources];
-    const uniqueSources = new Map(sources.map((source) => [source.id, source]));
+    try {
+      const thumbnailSize = { width: 240, height: 150 };
+      const [screenSources, windowSources] = await Promise.all([
+        desktopCapturer.getSources({
+          types: ['screen'],
+          thumbnailSize
+        }),
+        desktopCapturer.getSources({
+          types: ['window'],
+          thumbnailSize,
+          fetchWindowIcons: true
+        })
+      ]);
+      const sources = [...screenSources, ...windowSources];
+      const uniqueSources = new Map(sources.map((source) => [source.id, source]));
 
-    return [...uniqueSources.values()].map((source) => ({
-      id: source.id,
-      name: source.name,
-      thumbnail: source.thumbnail.toDataURL()
-    }));
+      return [...uniqueSources.values()].map((source) => ({
+        id: source.id,
+        name: source.name,
+        thumbnail: source.thumbnail.toDataURL()
+      }));
+    } catch {
+      // desktopCapturer.getSources fails on Wayland; return empty so the
+      // renderer falls through to getDisplayMedia with the system picker.
+      return [];
+    }
   });
 
   ipcMain.handle('prepare-linux-screen-share-audio-routing', async () => {

electron/window/create-window.ts

@@ -1,6 +1,8 @@
 import {
   app,
   BrowserWindow,
+  desktopCapturer,
+  session,
   shell
 } from 'electron';
 import * as fs from 'fs';
@@ -61,6 +63,34 @@ export async function createWindow(): Promise<void> {
     }
   });
 
+  if (process.platform === 'linux') {
+    session.defaultSession.setDisplayMediaRequestHandler(
+      async (_request, respond) => {
+        // On Linux/Wayland the system picker (useSystemPicker: true) handles
+        // the portal. This handler is only reached if the system picker is
+        // unavailable (e.g. X11 without a portal). Fall back to
+        // desktopCapturer so the user still gets something.
+        try {
+          const sources = await desktopCapturer.getSources({
+            types: ['window', 'screen'],
+            thumbnailSize: { width: 150, height: 150 }
+          });
+          const firstSource = sources[0];
+
+          if (firstSource) {
+            respond({ video: firstSource });
+            return;
+          }
+        } catch {
+          // desktopCapturer also unavailable
+        }
+
+        respond({});
+      },
+      { useSystemPicker: true }
+    );
+  }
+
   if (process.env['NODE_ENV'] === 'development') {
     const devUrl = process.env['SSL'] === 'true'
       ? 'https://localhost:4200'