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    On 07/15/2017 07:38 PM, David Cortesi wrote:<br>
    <blockquote type="cite"
cite="mid:CALyzANuRNN435om5Sh_6APXVJ041MwF1MXbrh2VdmZ7iC7Dd1g@mail.gmail.com">
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            <div>Probably some stupid misconfiguration? But a program
              that works perfectly on Win7 and almost perfectly on
              MacOS, on Ubuntu the window is completely black and a
              series of many iterations of the following appear in
              stderr:<br>
              <br>
              > QOpenGLShaderProgram::uniformLocation(qt_Matrix):
              shader program is not linked<br>
              > QOpenGLShaderProgram: could not create shader program<br>
              > QOpenGLShader: could not create shader<br>
              > shader compilation failed: ""<br>
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            The program uses only standard widgets e.g. QMainWindow,
            QListView, QWebEngineView. No explicit refs to QOpenG*
            anything.<br>
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          Suggestions welcome...<br>
          <br>
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        Dave Cortesi<br>
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      <pre wrap="">_______________________________________________
PyQt mailing list    <a class="moz-txt-link-abbreviated" href="mailto:PyQt@riverbankcomputing.com">PyQt@riverbankcomputing.com</a>
<a class="moz-txt-link-freetext" href="https://www.riverbankcomputing.com/mailman/listinfo/pyqt">https://www.riverbankcomputing.com/mailman/listinfo/pyqt</a></pre>
    </blockquote>
    Try commenting out parts of the application bit by bit until you can
    find out which component it is that is causing this. Once you have
    that it will be easier to help.<br>
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