Weird black screen with mousepointer icons when using QGLWidget

[JapieKrekel]

Anybody ever experienced this?

I have an iMX6 embbedded linux board, with a LCD and touchscreen.

I have an QML QtQuick 1.1 / C++ application. That works on the target.
When I want to HW accelerate it and put it on a QGLWidget it shows the first screen of the app. But when touching or clicking with the mouse, I get a black screen with all the mouse pointer icons blown up (like the hand, the arrow, the sand-hourglass, etc), after a screen refresh I get my app screen back. When an animation is accuring, the screen flickers between the app screen and this black mouse icon screen.

If I port my app to QML QtQuick 2.0/ C++, which is HW accelerated by default and not using the QDeclativeView, but the QQuickView, the app works fine.

This is what I do to make it a QGLWidget.
@
// Set view optimizations not already done for QDeclarativeView
setAttribute(Qt::WA_OpaquePaintEvent);
setAttribute(Qt::WA_NoSystemBackground);

// Make QDeclarativeView use OpenGL backend
QGLWidget *glWidget = new QGLWidget(this);
setViewport(glWidget);
setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
@

[JapieKrekel]

I switched to QT5.1.0 and figured out there is a environmental variable to hide the cursor on EGL and that seems to do the trick.

@
export QT_QPA_EGLFS_HIDECURSOR=1
@

Maybe it masks the real problem, but I do not need a mouse pointer.