Ask Ubuntu is a question and answer site for Ubuntu users and developers. It's 100% free.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

System specs and code sample in the end of this contribution!

First of all, I am new to this forum. Please tell me if there is anything wrong with the layout or the question itself. I am also new to linux, ubuntu and kind of a newbie at java. I was using windows 7 before ubuntu. The problem appeared first after installing ubuntu on my machine.


When running animation windows in eclipse, using the swing package or java applet - the animation is jumpy and not smooth. I will show you a sample from my code of a very simple program that consists of a JPanel and a JFrame with a background and a 2d-ball moving from left to right. The program is set to repaint every 30 ms. It shouldn't be a problem to run simple graphics like this. Eclipse is fast and smooth otherwise. Would appreciate any help or advice, if someone has encountered something like this before!

What i tried

*searching for bugs or problems related to this, but not finding any

*Installing the latest versions of Eclipse and the latest JDK

*Editing my eclipse.ini file

*running my code on My Windows 7 machine (Works fine)

*installing bumblebee and using nvidia optimus


OS: Ubuntu 12.04 (precise) 64-bit

Memory: 5.6 GiB, Processor intel Core 2.5 GHz x 4 CPU

Eclipse Juno 4.2.0

java version brings me

$ -java version
java version "1.7.0_21"
Java(TM) SE Runtime Environment (build 1.7.0_21-b11)
Java HotSpot(TM) 64-Bit Server VM (build 23.21-b01, mixed mode)

my eclipse.ini file





Code sample

/////////Sample from the JPanel class /////////

private int y = 200;
private int x = 0;

public testPanel() {
setPreferredSize(new Dimension(1500,400));

public void move() {
x = x+2;

public void paintComponent(Graphics g) {

///////Sample from the JFrame class /////////

private testPanel thePanel = new testPanel();
private Timer t = new Timer(30,this);

public testFrame() {


public void actionPerformed(ActionEvent e) {

Edit: Adding an exception: When i hover with my mouse ( and keep moving it ) over the application window the animation stops beeing jumpy. when i stop moving, it starts beeing not smooth and jumpy again. Anyone heard of this?

share|improve this question
First off, the layout is great! Secondly: do you have any Graphics driver installed? Because currently it might be rendered on your CPU which makes it jumpy. – BeryJu May 10 '13 at 15:52
if i run lspci | grep VGA i get VGA compatible controller: Intel Corporation Ivy Bridge Graphics Controller (rev 09) – lsund May 11 '13 at 7:34

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.