Mouse Dragging slow on X Terminal (SunRay)

Hi,
We're getting some curious behaviour with mouse drag events when running our java client app on an X Terminal (a SunRay 1 in this case).
It seems that events are not delivered to the client while the drag is in progress but only after the user stops moving the mouse for about a second. Needless to say, this is very annoying and kinda kills the interactivity in our app.
This delay seems to get worse the faster you move the mouse.
It's not just our app, either. All java apps we've tried do the same thing.
The delay gets smaller if you go all the way back to JVM 1.2, but all newer versions have the problem.
Sooooooo, what I'd like to know is:
- is this a known problem with SunRays?
- is there any configuration option in Java or the X Server I can tweak to improve performance?
TIA,
Andrew

I don't know the answer, but perhaps these links will help:
http://developer.java.sun.com/developer/bugParade/bugs/4669873.html
http://developer.java.sun.com/developer/bugParade/bugs/4485987.html
I hope this sheds at least a bit of light on your problem,
regards,
Alex

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877922 wrote:
peerComponents in Container class is returning null on call to getLocationOnScreen that causes this exception.
I fixed the issue in awt library but ORACLE license terms don't allow redistribution of modified version of awt.Something Oracle do allow is to raise a bug report. On that report they invite you to post a work-around or fix. That would be the place to put the fix you have devised. Oracle will (supposedly) fix it, then you (and everyone else) can enjoy the fix as a free upgrade in the next version.
They also offer 'support contracts' (AFAIU) in which you might pursue your own immediate fixes. But raise the bug report anyway.

Bug: lost selection after a mouse drag

To reproduce:
- select many entities in a diagram
- move them a bit via mouse drag
what happens
- the group loses focus. If you've been unfortunate, you've selected non-contiguous entities (via CTRL-click over) and now they are somewhere in the diagram, behind other entities, etc. and you can't move them back because you lost the group selection.
what should happen
- after the move, the group is still selected
Edited by: T. on Jun 6, 2011 5:06 AM

I have seen this too. I discovered that once they are all selected (ctrl-A) you need to be careful to then click inside one of the entities to do the drag otherwise it does get messed up. Undo fixes it sometimes. Other times I have exited without saving to get back to a previous arrangement.

Mouse Drag in JDialog produces Mouse Enter & Mouse Exit events in JFrame.

Hi, all.
Do I have a misconception here? When I drag the mouse in a modal JDialog, mouseEntered and mouseExited events are being delivered to JComponents in the parent JFrame that currently happens to be beneath that JDialog. I would not have expected any events to be delivered to any component not in the modal JDialog while that JDialog is displayed.
I submitted this as a bug many months ago, and have heard nothing back from Sun, nor can I find anything similar to this in BugTraq.
Here is sample code:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
* This class demonstrates what I believe are TWO bugs in Mouse Event handling in Swing
* 1.1.3_1, 1.1.3_2, 1.1.3_3, and 1.4.0.
* 1) When a MODAL JDialog is being displayed, and the cursor is DRAGGED from the JDialog
*    into and across the parent JFrame, Mouse Enter and Mouse Exit events are given to
*    the parent JFrame and/or it's child components. It is my belief that NO such events
*    should be delivered, that modal dialogs should prevent ANY user interaction with any
*    component NOT in the JDialog. Am I crazy?
*    You can reproduce this simply by running the main() method, then dragging the cursor
*    from the JDialog into and across the JFrame.
* 2) When a MODAL JDialog is being displayed, and the cursor is DRAGGED across the JDialog,
*    Mouse Enter and Mouse Exit events are given to the parent JFrame and/or it's child
*    components. This is in addition to the problem described above.
*    You can reproduce this by dismissing the initial JDialog displayed when the main()
*    method starts up, clicking on the "Perform Action" button in the JFrame, then dragging
*    the cursor around the displayed JDialog.
* The Mouse Enter and Mouse Exit events are reported via System.err.
public class DragTest
    extends JFrame
    public static void main(final String[] p_args)
        new DragTest();
    public DragTest()
        super("JFrame");
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                DragTest.this.dispose();
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                System.exit(0);
        MouseListener l_mouseListener = new MouseAdapter() {
            public void mouseEntered(final MouseEvent p_evt)
                System.err.println(">>> Mouse Entered: " + ((Component)p_evt.getSource()).getName() );
            public void mouseExited(final MouseEvent p_evt)
                System.err.println(">>> Mouse Exited: " + ((Component)p_evt.getSource()).getName() );
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        l_button = new JButton("JFrame South Button");
        l_button.setName(l_button.getText());
        l_button.addMouseListener(l_mouseListener);
        l_panel1.add(l_button, BorderLayout.SOUTH);
        l_button = new JButton("JFrame East Button");
        l_button.setName(l_button.getText());
        l_button.addMouseListener(l_mouseListener);
        l_panel1.add(l_button, BorderLayout.EAST);
        l_button = new JButton("JFrame West Button");
        l_button.setName(l_button.getText());
        l_button.addMouseListener(l_mouseListener);
        l_panel1.add(l_button, BorderLayout.WEST);
        l_button = new JButton("JFrame Center Button");
        l_button.setName(l_button.getText());
        l_button.addMouseListener(l_mouseListener);
        l_panel1.add(l_button, BorderLayout.CENTER);
        JButton l_actionButton = l_button;
        Container l_contentPane = this.getContentPane();
        l_contentPane.setLayout( new BorderLayout() );
        l_contentPane.add(l_panel1, BorderLayout.NORTH);
        JPanel l_panel2 = new JPanel();
        l_panel2.setName("JDialog Panel");
        l_panel2.addMouseListener(l_mouseListener);
        l_panel2.setLayout( new BorderLayout(50,50) );
        l_panel2.add( new JButton("JDialog North Button"), BorderLayout.NORTH );
        l_panel2.add( new JButton("JDialog South Button"), BorderLayout.SOUTH );
        l_panel2.add( new JButton("JDialog East Button"),   BorderLayout.EAST   );
        l_panel2.add( new JButton("JDialog West Button"),   BorderLayout.WEST   );
        l_panel2.add( new JButton("JDialog Center Button"), BorderLayout.CENTER );
        final JDialog l_dialog = new JDialog(this, "JDialog", true);
        WindowListener l_windowListener2 = new WindowAdapter() {
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                l_dialog.dispose();
        l_dialog.addWindowListener(l_windowListener2);
        l_dialog.setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
        l_dialog.getContentPane().add(l_panel2, BorderLayout.CENTER);
        l_dialog.pack();
        Action l_action = new AbstractAction() {
            { putValue(Action.NAME, "Perform Action (open dialog)"); }
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                l_dialog.setVisible(true);
        l_actionButton.setAction(l_action);
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        this.pack();
        this.setLocation(100,100);
        this.setVisible(true);
        l_dialog.setVisible(true);
}(Too bad blank lines are stripped, eh?)
Thanks in advance for any insights you may be able to provide.
---Mark

I guess we can think of this as one problem. When mouse dragged, JFrame also (Parent) receives events. If i understood correctly, what happens here is, Modal dialog creates its own event pump and Frame will be having its own. See the source code of Dialog's show() method. It uses an interface called Conditional to determine whether to block the events or yield it to parent pump.
Here is the Conditional code and show method code from java.awt.dialog for reference
package java.awt;
* Conditional is used by the EventDispatchThread's message pumps to
* determine if a given pump should continue to run, or should instead exit
* and yield control to the parent pump.
* @version 1.3 02/02/00
* @author David Mendenhall
interface Conditional {
    boolean evaluate();
/////show method
    public void show() {
        if (!isModal()) {
            conditionalShow();
        } else {
            // Set this variable before calling conditionalShow(). That
            // way, if the Dialog is hidden right after being shown, we
            // won't mistakenly block this thread.
            keepBlocking = true;
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                // We have two mechanisms for blocking: 1. If we're on the
                // EventDispatchThread, start a new event pump. 2. If we're
                // on any other thread, call wait() on the treelock.
                if (Toolkit.getEventQueue().isDispatchThread()) {
                    EventDispatchThread dispatchThread =
                        (EventDispatchThread)Thread.currentThread();
                       * pump events, filter out input events for
                       * component not belong to our modal dialog.
                       * we already disabled other components in native code
                       * but because the event is posted from a different
                       * thread so it's possible that there are some events
                       * for other component already posted in the queue
                       * before we decide do modal show.
                    dispatchThread.pumpEventsForHierarchy(new Conditional() {
                        public boolean evaluate() {
                            return keepBlocking && windowClosingException == null;
                    }, this);
                } else {
                    synchronized (getTreeLock()) {
                        while (keepBlocking && windowClosingException == null) {
                            try {
                                getTreeLock().wait();
                            } catch (InterruptedException e) {
                                break;
                if (windowClosingException != null) {
                    windowClosingException.fillInStackTrace();
                    throw windowClosingException;
    }I didn't get exactly what is happening but this may help to think further

Consuming extra mouse drag events?

Hi,
In my mouse drag listener, there is a bit heavy processing that can take slightly long time (doing some real time computation). If I move the mouse fast, then there would be a long pause before processing catch up.
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I tried java.awt.Toolkit.getDefaultToolkit().getSystemEventQueue().peekEvent(), but it always returns null.
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This heavy processing should be done in a new thread and not the event thread. If the event thread is busy processing, it's not going to be able to respond to drag events. Once you do that, it would be easy to set a flag in that thread to notify it to stop processing and start with new values.

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Default implementation of mouse drag event?

Is there any Default implementation of mouse drag event?
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So I've installed Photoshop CC 2014 and Illustrator CC 2014 on my computer, started a new file but only found that any action that includes mouse dragging - creating shapes, hand tool, pen tool - do not work at all, everything just do not respond, when creating a shape it will treat it as if I have clicked once (which pops out the create rectangle window for size input..), the same situation happens to Photoshop as well (perhaps all Adobe CC software). I've been trying everything that have been suggested on the forum (some from the links below): removing all other software at the background (spotify, 1password, etc). Also I've tried with using different sets of keyboard and mouse, either wired and wireless, still no luck. One situation that finally works is that all software work perfectly fine in safe mode, then I rebooted back to normal mode, try killing any background process that was not running in safe mode, still...not working at all...
References:
(Illustrator CS6) Spacebar stops working seemingly randomly
Spacebar Shortcut: Hand Tool Not Showing and Not Working
Illustrator gets stuck on hand tool
My computer specs:
Windows 7 Pro 64-bit
Intel Core i3-4130 3.4Ghz
4GB RAM

wecon,
You could try to reinstall using the full three step way:
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http://www.adobe.com/support/contact/cscleanertool.html

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I am dragging the mouse on a half circle from the middle left to the top middle. This results in mouse events with the coordinates form (10,90) ->(100,10)
Letting the mouse go and then dragging it further to the left, the coordinates in the of the event are similar than the starting point of the first mouse drag event.
Can anyone shed some light on this peculiar behavior?

First of, I have to apologize for the example not being as minimalistic as it might be, but on the plus side, I know now why this happens, I just don't know how to work around it.
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
package javafxtest;
import java.util.ArrayList;
import javafx.application.Application;
import javafx.beans.property.DoubleProperty;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Dimension2D;
import javafx.geometry.Point2D;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.scene.shape.Polygon;
import javafx.scene.shape.Rectangle;
import javafx.scene.shape.Shape;
import javafx.scene.transform.Rotate;
import javafx.stage.Stage;
* @author andi
public class HandleRotation extends Application {
    private DoubleProperty currentRotation;
    private ArrayList<Double> angles;
    @Override
    public void start(Stage primaryStage) {
        currentRotation = new SimpleDoubleProperty(this, "currentRotation", 10);
        SteeringWheelGroup background = new SteeringWheelGroup(200);
        background.setManaged(false);
        Group g = new Group(background);
        final Point2D centerPoint = new Point2D(100, 100);
        angles = new ArrayList<>(3);
        angles.add(190.0);
        angles.add(270.0);
        angles.add(350.0);
        double step = (180.0 - 2 * currentRotation.doubleValue()) / (angles.size() - 1);
        int radius = 100;
        final int yTranslation = 15; // might be due to the labels
        Polygon handle = createHandle(centerPoint, radius, yTranslation);
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        StackPane root = new StackPane();
        Scene scene = new Scene(g, 300, 250);
        primaryStage.setTitle("Handle Rotation!");
        primaryStage.setScene(scene);
        primaryStage.show();
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     * @param radius radius of the circle
     * @param angle in degree in [0,180]
     * @return Point on the circle
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        float newX = (float) (center.getX() + radius * Math.cos(Math.toRadians(angle)));
        float newY = (float) (center.getY() + radius * Math.sin(Math.toRadians(angle)));
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     * @param centerPoint
     * @param radius
     * @return
    private Polygon createHandle(final Point2D centerPoint, int radius, final int yTranslation) {
        double baseAngle = 180;
        Point2D p1 = calculateBasePoint(centerPoint, radius, baseAngle - 5);
        Point2D p2 = calculateBasePoint(centerPoint, radius, baseAngle + 2);
        Point2D p3 = calculateBasePoint(centerPoint, radius*0.65, baseAngle + 2);
        Point2D p4 = calculateBasePoint(centerPoint, radius*0.65, baseAngle - 7);
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                  Polygon polygon = new Polygon(points);
//        polygon.setOpacity(0);
        polygon.setTranslateY(-yTranslation);
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        polygon.getTransforms().add(rotationTransform);
        polygon.setOnMouseDragged(new EventHandler<MouseEvent>() {
            @Override
            public void handle(MouseEvent event) {
                if (event.getY() < centerPoint.getY()) {
System.out.println("Event: "+event);
                                                   Point2D point = new Point2D((float)event.getX(), (float)event.getY());
                    double newAngle = angleBetween2Lines(centerPoint, point);
                    if (newAngle < 0) {
                        newAngle = (90 + newAngle)+ 90;
System.out.println("Set angle on mouse drag: "+newAngle);
                    if (newAngle < 10) {
                        newAngle = 10;
                    if (newAngle > 170) {
                        newAngle = 170;
                    currentRotation.set(newAngle);
        polygon.setOnMouseReleased(new EventHandler<MouseEvent>() {
            @Override
            public void handle(MouseEvent event) {
                snapToNearestAngle();
                rotationTransform.setAngle(currentRotation.doubleValue());
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        double currentMin = 360;
        int minIndex = 0;
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        for (int i = 0; i < angles.size(); i++) {
            double angle = angles.get(i);
            double diff = Math.abs(angle - currentAngle);
            if (diff < currentMin) {
                currentMin = diff;
                minIndex = i;
System.out.println("new minDifference at "+i+": "+diff);
        Double destinationAngle = angles.get(minIndex);
System.out.println("DestinationAngle is "+currentAngle+" -> "+(destinationAngle - 180));
        if (destinationAngle < 180 + 10 || destinationAngle > 360 - 10) {
            throw new IllegalStateException("Angle is out of range: "+currentRotation.doubleValue()+" -> "+destinationAngle);
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     * and the current point.
     * @param center point
     * @param point current point
     * @return angle in degree
    double angleBetween2Lines(Point2D center, Point2D point) {
        double slope2 = calculateSlope(center, point);
        double angle = Math.atan(slope2);
        if (point.getX() > center.getX()) {
            angle += Math.PI/2;
System.out.println("Slope: "+slope2+" angle "+Math.toDegrees(angle));
        return Math.abs(Math.toDegrees(angle));
     * Caluculate the slope of the line defined by two points.
     * The first point is the center of a circle and the second
     * point roughly lies on the circle.
     * @param center point
     * @param point on the circle
     * @return slope of the connecting line.
    double calculateSlope(Point2D center, Point2D point) {
System.out.println("center="+center+",point="+point);
        double absSlope = Math.abs((point.getY() - center.getY()) / (point.getX() - center.getX()));
        if (point.getY() > center.getY()) {
            if (point.getX() > center.getX()) {
                // bottom right
                return -absSlope;
            } else {
                // bottom left
                return absSlope;
        } else {
            if (point.getX() > center.getX()) {
                // top right
                return absSlope;
            } else {
                // top left
                return -absSlope;
     * The main() method is ignored in correctly deployed JavaFX application.
     * main() serves only as fallback in case the application can not be
     * launched through deployment artifacts, e.g., in IDEs with limited FX
     * support. NetBeans ignores main().
     * @param args the command line arguments
    public static void main(String[] args) {
        launch(args);
   private class SteeringWheelGroup extends Group {
        public SteeringWheelGroup(int destinationWidth) {
            int topPadding = 0;
            Rectangle rect = new Rectangle(getImageWidth(), getImageWidth(), Color.RED);
            double scale = destinationWidth / rect.getWidth();
            rect.setScaleX(scale);
            rect.setScaleY(scale);
            Circle circle = new Circle(getImageWidth()/2, getImageWidth()/2, getImageWidth()/2, Color.BLUE);
            circle.setScaleX(scale);
            circle.setScaleY(scale);
            Group rotationGroup = new Group(/*rect,*/ circle);
            rotationGroup.setManaged(false);
            int width = getImageWidth();
            Rectangle clipRectangle = new Rectangle(0, 0, width, width / 2);
            Circle clipCircle = new Circle(width / 2, width / 2, width / 2);
            Shape clip = Shape.intersect(clipRectangle, clipCircle);
            rotationGroup.setClip(clip);
            this.getChildren().add(rotationGroup);
            //double h = calculateHeigthOverHorizon(angle, destinationWidth/2);
            //setTranslateY(-h+topPadding);
        public final int getImageWidth() {
            return 479;
Here is how you can reproduce my effect:
Grab the black handle
Drag the mouse top and right until you approach the angle -90 (have an eye out on the console log)
Let the mouse go: the handle will snap to 90 degree
Grab the handle a second time and move further right
You will see that the angle printed out do not match what you expect.
Let the mouse go, the Handle snaps back to it's original position
As the rotation does not happen around the polygon's center, I have to use a Rotaion effect, which is applied. While I can drag the shape from the rotated location the dragging is always measured from its base position.
So what can I do to work around this?
final Rotate rotationTransform = new Rotate(currentRotation.doubleValue(), centerPoint.getX(), centerPoint.getY());
polygon.getTransforms().add(rotationTransform);
If worse comes to worst, I can use a circular handle covering everything, then I can rotate around its center, but I would like to avoid this.

Scroll JTable in Scrollpane with mouse drag

Hello developers !
I'm trying to make a scrollable Jtable. The table have to be scrollable with the mouse drag event. But I have a "flashing" Problem. I can catch the Mouse events from the table (I'm listener the mouse motion and mouse events).
When I receive a new mouse drag event, I set the new position from the viewport. The problem is, that the Table flash:
For example:
I drag the mouse to the bottom of the table. The mouse "y" position have to increase, but it doesn't:
first motion event position (10, 10)
second motion event position (10, 15)
third motion event position (10, 12)
etc..
The position of the mouse event are in relation of the component position. I think, the problem is that I change the position of the view port and than the new mouse event is "on a wrong reference".
Could someone help me? How could I make a work around for this Problem?

I have the solution... it is easy.
I post the solution because i spent two days making working around (changing viewport position other scrollbar values, etc).
You dont need to implement the Autoscroll interface. The Autoscroll interface is for Drag and Drop classes.
The key was the function JTable#scrollRectToVisible....
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
public class ScrollableTableFrame extends JFrame{
protected ScrollableTable table;
public ScrollableTableFrame() {
    super("Scrollable Table");
    setSize(600, 300);
    String data[][] = new String[40][40];
    String header[] = new String[40];
    for(int i = 0; i < 40; i++){
      header[i] = "Header " + i;
      for(int j = 0; j < 40; j++){
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    JScrollPane sp = new JScrollPane();
    sp.getViewport().setBackground(table.getBackground());
    sp.getViewport().add(table);
    getContentPane().add(sp, BorderLayout.CENTER);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setSize(400, 400);
    setVisible(true);
public static void main(String args[]){
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class ScrollableTable extends JTable{
private Point firstPressedPoint;
public ScrollableTable(Object rowData[][], Object columnNames[]){
    super(rowData, columnNames);
protected void processMouseEvent(MouseEvent e){
    int id = e.getID();
    switch(id) {
      case MouseEvent.MOUSE_PRESSED:
        firstPressedPoint = e.getPoint();
        break;
      case MouseEvent.MOUSE_RELEASED:
        firstPressedPoint = null;
        break;
      case MouseEvent.MOUSE_CLICKED:
      case MouseEvent.MOUSE_EXITED:
      case MouseEvent.MOUSE_ENTERED:
    super.processMouseEvent(e);
protected void processMouseMotionEvent(MouseEvent e){
    if(e.getID() == MouseEvent.MOUSE_DRAGGED){
      Rectangle r = getVisibleRect();
      Point p = e.getPoint();
      int dx = (firstPressedPoint.x-p.x);
      int dy = (firstPressedPoint.y-p.y);
      Rectangle aRect = new Rectangle(r.x + dx, r.y + dy , r.width + dx, r.height + dy);
      scrollRectToVisible(aRect);
}P.S.: jarshe, thank you for your help !!

Simulating mouse drag events?

Hi all,
I am wrinting unit tests for my swing application. For one test I want to simulate a drag event over a panel. I have tried JFCUnit, but does not seem to work for this, so I am trying to write my own.
I create 3 mouse events and post them on the system event queue. A mouse press event, a mouse drag event and a mouse release event. MouseEvent's do let you specify a drag start and a drag end point in their constructor. So I have tried using both, but neither works.
Am I doing anything wrong? The component I'm operating on gets the mouse pressed and mouse released events, but thats all.
any help much appreciated,
Justin

I tried using the Robot class alright, but it does really wierd things. I sometimes doesn't work for simulating dragging events. I have a component that you can drag anywhere on the screen using the mouse, without having to use the titlebar. I am trying to test this dragging, but with the robot class, it looks like it goes into an infinate recursion. The mouseDragged method gets executed thosands of times, and you can see the panel shifting from its origional position to the new position and back again for a few seconds. Could be a bug in Robot class.

Mouse dragged event - problem(logic problem?)

Hi! I have a window which is started by a frame. At the moment I have a Mouse Dragged event. The ideea is that I would like to drag the window to various parts of the screen but as it is the window flickers a lot and it keeps on jumping to various locations when dragging it. Is there a way to redraw and move the window only once the mouse button was released from the drag and not all the time?!
Thank you.

if i understood your question correct setVisible(false) when you grab it setVisivble(true) when you release it. If you want it to be still shown in the ori�ginal place while dragging make a second window that stays at the starting location and id removed after the first diappears.
An even better solution would be to remember the location of the mouse in a pousepressed event and then wait for mousereleased. (and set a boolean true if the mouse pressed was inside the window).

AIR application object - mouse drag problem

Hi,
We face the following problem. Attached herewith are code sample and simulation for the problem. Would be great if someone could help us.
Problem: Objects created in AIR application experience mouse drag problem.
To simulate the problem please execute the sample application, a grey box (object) appears on the screen. Hold down left and right mouse buttons and drag the object and release both the mouse buttons. Object sticks to mouse pointer and moves along with mouse pointer to wherever it is dragged.
Steps to Reproduce - Hold down left and right mouse buttons and drag the object and later release both the mouse buttons. Notice Object sticks to mouse pointer and moves along with mouse pointer to wherever it is dragged. Object stops to move along with mouse pointer after sometime, then move the mouse pointer to the object and see that it sticks to pointer again and gets dragged along with the pointer.
Actual Result - Object sticks to mouse pointer and moves along with mouse pointer to wherever it is dragged.
Expected Result - Object should not stick to mouse pointer even after the mouse buttons are released.
Due to problems with uploading the attachment here, please send a email to the following email-id ([email protected]) and I shall send the attachment in response.
Thanks in advance.

After some research, it seems this problem has been there for years with Bootcamp. Hope Apple can develop a better touchpad driver soon.

Immediately updating to 33.0.3 when in new message curser/mouse is slow.

when I start a new message the mouse is slow to respond. this happened immediately after updating to ver 33.0.3.
this is not a problem when simply viewing the emails.
windows xp pro
thanks
christy

What computer system are you using? Did you post this from the problem
computer? If not;
Type '''about:support''' in the address bar and press '''Enter.'''
Under the main banner, press the button; '''Copy Text To Clipboard.'''.
Then in the reply box at the bottom of this page,
do a right click in the box and select '''Paste.'''
This will show us your system details.
'''No Personal Information Is Collected.'''
'''[https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode Start Firefox in Safe Mode]''' {web link}
While you are in safe mode;
Type '''about:preferences#advanced'''<Enter> in the address bar.
Under '''Advanced,''' Select '''General.'''
Look for and turn off '''Use Hardware Acceleration'''.
Poke around safe web sites. Are there any problems?
Then restart.

Mouse Dragging slow on X Terminal (SunRay)

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