Qt5 eglfs QWT6.1 Empty Plot region

[Uwe]

Only the plots are empty. The result is same for any example / custom application that uses plot.

Please try the simple_plot example as it is it does absolutely nothing special - no overlays etc.

What happens, when you disable the internal backing store of the canvas:

QwtPlotCanvas *canvas = new QwPlotCanvas();
canvas->setPaintAttribute( QwtPlotCanvas::BackingStore, false );
plot->setCanvas( canvas );

QwtPlotCanvas *canvas = new QwPlotCanvas();
canvas->setPaintAttribute( QwtPlotCanvas::BackingStore, false );
plot->setCanvas( canvas );

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Uwe