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03-20-2019, 07:11 AM | #1 |
Junior Member
Join Date: Mar 2019
Posts: 4
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5.1 Crashes when launching Java 8 Swing app with closed lid
I have a macBook Pro (15-inch, Late 2016) running on macOS Mojave 10.14.3 with DisplayLink Driver 5.1 for the Dell Dock D6000.
I use a single external monitor with 1920x1200 resolution via a DisplayPort Adapter. When I connect the macBook to the dock and close the lid, then I cannot start any Java Swing based application using JDK8 or JDK11. You can use the following code to reproduce the problem. The code is based on a Stackoverflow example. Code:
package dell_d6000; import java.awt.GraphicsConfiguration; import java.awt.GraphicsDevice; import java.awt.GraphicsEnvironment; import java.awt.Label; import javax.swing.JFrame; public class Demo { private static void print(String name) { System.out.println(name); } private static void print(String name, Object value) { System.out.println(name + ": '" + value + "'"); } public static void main(String[] args) { print("=== Start ==="); final GraphicsEnvironment localGraphicsEnvironment = GraphicsEnvironment.getLocalGraphicsEnvironment(); print("localGraphicsEnvironment", localGraphicsEnvironment); final GraphicsDevice defaultScreenDevice = localGraphicsEnvironment.getDefaultScreenDevice(); print("defaultScreenDevice", defaultScreenDevice); final GraphicsConfiguration defaultConfiguration = defaultScreenDevice.getDefaultConfiguration(); print("defaultConfiguration", defaultConfiguration); print("'new JFrame(\"Demo\");' will produce a NullPointerException when defaultConfiguration is null. This is a DisplayLink Driver 5.1 bug"); final JFrame frame = new JFrame("Demo"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.getContentPane().add(new Label("*** Hello World! ***")); frame.pack(); frame.setVisible(true); print("==== End ===="); } } Code:
=== Start === localGraphicsEnvironment: 'sun.awt.CGraphicsEnvironment@3d075dc0' defaultScreenDevice: 'sun.awt.CGraphicsDevice@214c265e' defaultConfiguration: 'null' 'new JFrame("Demo");' will produce a NullPointerException when defaultConfiguration is null. This is a DisplayLink Driver 5.1 bug Exception in thread "main" java.lang.NullPointerException at java.awt.Window.init(Window.java:497) at java.awt.Window.<init>(Window.java:537) at java.awt.Frame.<init>(Frame.java:420) at javax.swing.JFrame.<init>(JFrame.java:233) at dell_d6000.Demo.main(Demo.java:29) Code:
=== Start === localGraphicsEnvironment: 'sun.awt.CGraphicsEnvironment@6d03e736' defaultScreenDevice: 'sun.awt.CGraphicsDevice@568db2f2' defaultConfiguration: 'CGLGraphicsConfig[dev=69733447,pixfmt=0]' 'new JFrame("Demo");' will produce a NullPointerException when defaultConfiguration is null. This is a DisplayLink Driver 5.1 bug ==== End ==== - https://www.displaylink.org/forum/sh...ad.php?t=66114 - https://stackoverflow.com/questions/...rtup-on-mac-os A fix for this issue would be very much appreciated. Thank you. Last edited by phs; 03-20-2019 at 07:13 AM. Reason: Formatted second result |
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