diff --git a/main.js b/main.js
index 5c8bcd3..c6b1939 100644
--- a/main.js
+++ b/main.js
@@ -61,18 +61,19 @@ if (process.platform === 'linux') {
     console.log(`[GPU] SteamOS/Gamescope DETECTED: ${detectionReason}`);
     console.log('[GPU] Applying SteamOS-specific GPU flags for webview rendering...');
     
-    // SteamOS GPU flags - use ANGLE for rendering
+    // Critical flags for SteamOS/Gamescope webview rendering
+    // SteamOS only supports egl-angle, NOT desktop GL
     app.commandLine.appendSwitch('ozone-platform', 'x11');
-    app.commandLine.appendSwitch('use-angle', 'gl');
-    app.commandLine.appendSwitch('angle-platform-type', 'x11');
-    
-    // GPU process settings
-    app.commandLine.appendSwitch('in-process-gpu');
+    app.commandLine.appendSwitch('use-gl', 'egl');
+    app.commandLine.appendSwitch('use-angle', 'default');
+    app.commandLine.appendSwitch('disable-gpu-compositing');
     app.commandLine.appendSwitch('disable-gpu-vsync');
+    app.commandLine.appendSwitch('disable-software-rasterizer');
+    app.commandLine.appendSwitch('disable-features', 'VizDisplayCompositor,UseChromeOSDirectVideoDecoder');
+    app.commandLine.appendSwitch('enable-features', 'UseOzonePlatform,Vulkan');
     
-    // Feature flags
-    app.commandLine.appendSwitch('enable-features', 'VulkanFromANGLE,UseOzonePlatform');
-    app.commandLine.appendSwitch('disable-features', 'VizDisplayCompositor');
+    // In-process GPU can help with stability on Steam Deck
+    app.commandLine.appendSwitch('in-process-gpu');
   } else {
     console.log('[GPU] Standard Linux environment detected');
     
diff --git a/package.json b/package.json
index 82f386b..c5013ad 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "main": "main.js",
   "scripts": {
     "start": "electron .",
-    "start:steamos": "electron . --ozone-platform=x11 --use-angle=gl --angle-platform-type=x11 --in-process-gpu --no-sandbox --disable-dev-shm-usage --disable-features=VizDisplayCompositor",
+    "start:steamos": "electron . --ozone-platform=x11 --disable-gpu-compositing --disable-gpu-vsync --no-sandbox --disable-dev-shm-usage --disable-features=VizDisplayCompositor",
     "start:linux-safe": "electron . --disable-gpu --disable-gpu-compositing --no-sandbox",
     "dist": "electron-builder",
     "dist:appimage": "electron-builder --linux AppImage",