I recently just got Qt 4.7 (from Qt 4.6.1). Ever since then any application that I create a QGLWidget for are causing that application to lock up whenever I move/resize the main window. When I resize, the mouse stays on the resize cursor. When I try to move the window it won't move. In both cases my machine locks up and I have to ctrl+alt+delete to get out of this state. I update my QGLWidget by creating a QTimer and connect the timeout() signal to the QGLWidget's updateGL() function.

I simple default GUI project I created with Qt Creator 2.0 can reproduce this problem. See .cpp file for MainWindow below:

MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);

myTimer = new QTimer(this);

myGlWidget = new QGLWidget(this);

connect(myTimer, SIGNAL(timeout()), this, SLOT(updateRender()));

myTimer->start(0);
}

void MainWindow::updateRender()
{
if(myGlWidget)

}

As you can see in the example I'm using nothing but pure Qt Code. This works perfectly fine if I compile under the 4.6.1 SDK that I had before.