diff --git a/firmware/CHANGELOG.md b/firmware/CHANGELOG.md
index 7fc418da62..6611cd69c4 100644
--- a/firmware/CHANGELOG.md
+++ b/firmware/CHANGELOG.md
@@ -28,6 +28,8 @@ All notable user-facing or behavior-altering changes will be documented in this
 ## Month 202x Release - "Release Name"
 ### Fixed
  - SD card logs bugfix #2556 
+ - Too many small logs are zero size #2553
+ - Launcher splash screen is freezy #2560
 
 ## April 2021 Release "Be Kind to Lawyers Day"
 ### Added
diff --git a/java_console/shared_io/src/main/java/com/rusefi/rusEFIVersion.java b/java_console/shared_io/src/main/java/com/rusefi/rusEFIVersion.java
index e469c8695d..7f41945e9f 100644
--- a/java_console/shared_io/src/main/java/com/rusefi/rusEFIVersion.java
+++ b/java_console/shared_io/src/main/java/com/rusefi/rusEFIVersion.java
@@ -6,7 +6,7 @@ import java.net.URL;
 import java.util.concurrent.atomic.AtomicReference;
 
 public class rusEFIVersion {
-    public static final int CONSOLE_VERSION = 20210413;
+    public static final int CONSOLE_VERSION = 20210415;
     public static AtomicReference<String> firmwareVersion = new AtomicReference<>("N/A");
 
     public static long classBuildTimeMillis() {
diff --git a/java_console/ui/src/main/java/com/rusefi/SerialPortScanner.java b/java_console/ui/src/main/java/com/rusefi/SerialPortScanner.java
index ef62ba0400..8c0743d124 100644
--- a/java_console/ui/src/main/java/com/rusefi/SerialPortScanner.java
+++ b/java_console/ui/src/main/java/com/rusefi/SerialPortScanner.java
@@ -4,7 +4,6 @@ import com.rusefi.io.LinkManager;
 import com.rusefi.io.tcp.TcpConnector;
 import org.jetbrains.annotations.NotNull;
 
-import javax.swing.*;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -16,19 +15,17 @@ import java.util.concurrent.CopyOnWriteArrayList;
 public enum SerialPortScanner {
     INSTANCE;
 
+    private volatile boolean isRunning = true;
+
     static final String AUTO_SERIAL = "Auto Serial";
     @NotNull
-    private List<String> knownPorts = new ArrayList<>();
+    private final List<String> knownPorts = new ArrayList<>();
 
     public List<Listener> listeners = new CopyOnWriteArrayList<>();
 
-    private final Timer scanPortsTimer = new Timer(1000, e -> findAllAvailablePorts());
-
-
     /**
      * Find all available serial ports and checks if simulator local TCP port is available
      */
-    @NotNull
     void findAllAvailablePorts() {
         List<String> ports = new ArrayList<>();
         String[] serialPorts = LinkManager.getCommPorts();
@@ -57,11 +54,23 @@ public enum SerialPortScanner {
     }
 
     public void startTimer() {
-        scanPortsTimer.start();
+        Thread portsScanner = new Thread(() -> {
+            while (isRunning) {
+                findAllAvailablePorts();
+                try {
+                    Thread.sleep(1000);
+                } catch (InterruptedException e) {
+                    throw new IllegalStateException(e);
+                }
+            }
+
+        }, "Ports Scanner");
+        portsScanner.setDaemon(true);
+        portsScanner.start();
     }
 
     public void stopTimer() {
-        scanPortsTimer.stop();
+        isRunning = false;
     }
 
     interface Listener {
diff --git a/java_console/ui/src/main/java/com/rusefi/StartupFrame.java b/java_console/ui/src/main/java/com/rusefi/StartupFrame.java
index 7dad425d1e..dfb5e9ae53 100644
--- a/java_console/ui/src/main/java/com/rusefi/StartupFrame.java
+++ b/java_console/ui/src/main/java/com/rusefi/StartupFrame.java
@@ -25,7 +25,6 @@ import java.util.List;
 import static com.rusefi.ui.storage.PersistentConfiguration.getConfig;
 import static com.rusefi.ui.util.UiUtils.getAllComponents;
 import static com.rusefi.ui.util.UiUtils.setToolTip;
-import static java.awt.image.ImageObserver.ABORT;
 import static javax.swing.JOptionPane.YES_NO_OPTION;
 
 /**
@@ -50,10 +49,10 @@ public class StartupFrame {
     @NotNull
     private List<String> currentlyDisplayedPorts = new ArrayList<>();
     private boolean isFirstTimeApplyingPorts = true;
-    private JPanel leftPanel = new JPanel(new VerticalFlowLayout());
+    private final JPanel leftPanel = new JPanel(new VerticalFlowLayout());
 
-    private JPanel realHardwarePanel = new JPanel(new MigLayout());
-    private JPanel miscPanel = new JPanel(new MigLayout()) {
+    private final JPanel realHardwarePanel = new JPanel(new MigLayout());
+    private final JPanel miscPanel = new JPanel(new MigLayout()) {
         @Override
         public Dimension getPreferredSize() {
             // want miscPanel and realHardwarePanel to be the same width
@@ -66,7 +65,7 @@ public class StartupFrame {
      * closing the application.
      */
     private boolean isProceeding;
-    private JLabel noPortsMessage = new JLabel("No ports found!");
+    private final JLabel noPortsMessage = new JLabel("No ports found!");
 
     public StartupFrame() {
 //        AudioPlayback.start();
@@ -152,28 +151,25 @@ public class StartupFrame {
             realHardwarePanel.add(new EraseChip().getButton(), "right, wrap");
         }
 
-        SerialPortScanner.INSTANCE.listeners.add(new SerialPortScanner.Listener() {
-            @Override
-            public void onChange() {
-                List<String> ports = SerialPortScanner.INSTANCE.getKnownPorts();
-                if (!currentlyDisplayedPorts.equals(ports) || isFirstTimeApplyingPorts) {
-                    FileLog.MAIN.logLine("Available ports " + ports);
-                    isFirstTimeApplyingPorts = false;
-                    connectPanel.setVisible(!ports.isEmpty());
-                    noPortsMessage.setVisible(ports.isEmpty());
+        SerialPortScanner.INSTANCE.listeners.add(() -> SwingUtilities.invokeLater(() -> {
+            List<String> ports = SerialPortScanner.INSTANCE.getKnownPorts();
+            if (!currentlyDisplayedPorts.equals(ports) || isFirstTimeApplyingPorts) {
+                FileLog.MAIN.logLine("Available ports " + ports);
+                isFirstTimeApplyingPorts = false;
+                connectPanel.setVisible(!ports.isEmpty());
+                noPortsMessage.setVisible(ports.isEmpty());
 //        panel.add(comboSpeeds); // todo: finish speed selector UI component
 //            horizontalLine.setVisible(!ports.isEmpty());
 
-                    applyPortSelectionToUIcontrol(ports);
-                    currentlyDisplayedPorts = ports;
-                    UiUtils.trueLayout(connectPanel);
-                    frame.pack();
-                }
-
+                applyPortSelectionToUIcontrol(ports);
+                currentlyDisplayedPorts = ports;
+                UiUtils.trueLayout(connectPanel);
+                frame.pack();
             }
-        });
+        }));
 
 
+        // todo: invoke this NOT on AWT thread?
         SerialPortScanner.INSTANCE.findAllAvailablePorts();
 
         final JButton buttonLogViewer = new JButton();