diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/ProtoLogController.java b/libs/WindowManager/Shell/src/com/android/wm/shell/ProtoLogController.java
index e2012b4e36dc9..88525aabe53b3 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/ProtoLogController.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/ProtoLogController.java
@@ -16,8 +16,6 @@
 
 package com.android.wm.shell;
 
-import android.os.Build;
-
 import com.android.wm.shell.protolog.ShellProtoLogImpl;
 import com.android.wm.shell.sysui.ShellCommandHandler;
 import com.android.wm.shell.sysui.ShellInit;
@@ -43,9 +41,6 @@ public class ProtoLogController implements ShellCommandHandler.ShellCommandActio
 
     void onInit() {
         mShellCommandHandler.addCommandCallback("protolog", this, this);
-        if (Build.IS_DEBUGGABLE) {
-            mShellProtoLog.startProtoLog(null /* PrintWriter */);
-        }
     }
 
     @Override
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/protolog/ShellProtoLogImpl.java b/libs/WindowManager/Shell/src/com/android/wm/shell/protolog/ShellProtoLogImpl.java
index c59c42dadb9dc..93ffb3dc8115e 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/protolog/ShellProtoLogImpl.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/protolog/ShellProtoLogImpl.java
@@ -31,7 +31,8 @@ import java.io.PrintWriter;
  */
 public class ShellProtoLogImpl extends BaseProtoLogImpl {
     private static final String TAG = "ProtoLogImpl";
-    private static final int BUFFER_CAPACITY = 128 * 1024;
+    private static final int BUFFER_CAPACITY = 1024 * 1024;
+    // TODO: find a proper location to save the protolog message file
     private static final String LOG_FILENAME = "/data/misc/wmtrace/shell_log.winscope";
     private static final String VIEWER_CONFIG_FILENAME = "/system_ext/etc/wmshell.protolog.json.gz";