[SOLVED] Screenshot robot only captures a black screen on Debian

Issue

I am creating a screen capture using java.awt.Robot under Linux with OpenJDK 11. The result on Linux is a whole black image. The same code works on Ubuntu and Windows (using another file path of course).

Any clue?

public void captureScreen() throws AWTException {
    Robot robot = new Robot(GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice());
    BufferedImage screen = robot.createScreenCapture(new Rectangle(getDefaultToolkit().getScreenSize()));
    try {
        ImageIO.write(screen, "jpg", new File("/tmp/screenshot.jpg"));
    } catch (IOException e) {
        e.printStackTrace();
    }
}

UPDATE: The the cause of the problem lies in the combination of OpenJDK and Wayland. With Oracle JDK/JRE (13.0.1) everything works fine.

Solution

If you are using wayland instead of XOrg this may be causing the problem as it is less stable with Java interfaces for graphics operations.

Edit: This bug has now been fixed (see OP)

Answered By - James Stone

Answer Checked By - Mildred Charles (WPSolving Admin)