Details
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Bug
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Resolution: Unresolved
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P2: Important
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None
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5.9.3
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None
Description
hello,
i put together a small code snippet for QtCreator, to better showcase the issue i see in my dual-head setup with a Qt widget app running through EGLFS on a libMali.so/DRM/KMS setup on Allwinner A20 mainline based OS:
https://github.com/aventuri/widgetMultiScreen
the outcome is the wrong display of the two (yellow and red) rectangles with the code above only on the ext HDMI diplay. see:
https://drive.google.com/open?id=1tGJxoBzBNn_wEhCi5mnI5a5zLSKIrAwX
the puzzling issue is that if i comment out the w2.show() line:
https://github.com/aventuri/widgetMultiScreen/blob/master/main.cpp#L3
i can see (correctly) a single yellow screen on the primary LCD display.
can someone point me toward better debugging? is a GDB step by step approach the best one? the Qt stack is that huge..