In QtBrowserPlugin QLineEdit is not working on X11

Modifying the example code Trivial.cpp

Trivial(QWidget *parent = 0)
: QWidget()

{ m_label = new QLabel(QString::fromLatin1("Empty")); m_label->setText("Empty"); m_lineEdit = new QLineEdit(); QVBoxLayout *layout = new QVBoxLayout; layout->addWidget(m_label); layout->addWidget(m_lineEdit); setLayout(layout); }

The label and the editor becomes visible (in some cases like the javascript example and pressing the about button), but its not possible to give them focus.
The same example works on Windows and Osx.
Problem can be that it uses QX11EmbedWidget, but it is not running in a separate process and the qt events are not getting sent. If qApp->exec() is called somewhere in the plugin then the browser freezes, but the widget works.