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    Unsolved Blank screen in RaspberryPi

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    • M
      MajidKamali last edited by

      Hi.
      I cross compiled Qt 5.12.3 for raspberry pi 3 B+ successfully with this link.
      But when I compile and deploy application to raspberry, screen is blank and lots of following error is shown in console:

      QOpenGLShaderProgram::uniformLocation(qt_Matrix): shader program is not linked
      QOpenGLShaderProgram: could not create shader program
      QOpenGLShader: could not create shader
      QOpenGLShader: could not create shader
      shader compilation failed: 
      ""
      

      Screen is a common HDMI monitor.
      What should I do? :(
      Thanks

      1 Reply Last reply Reply Quote 0
      • M
        MajidKamali last edited by

        I recompiled and reinstalled everything from scratch and it worked, UNTILL I installed something in raspberrypi (gpac, for MP4Box tool), and blank screen come again :(
        That's strange :|
        there is a Buffer creation failed error, before above errors.

        jsulm 1 Reply Last reply Reply Quote 0
        • jsulm
          jsulm Lifetime Qt Champion @MajidKamali last edited by

          @MajidKamali What do you use on the device? X11? Framebuffer? ...?

          https://forum.qt.io/topic/113070/qt-code-of-conduct

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          • M
            MajidKamali last edited by

            eglfs. device is a raspberry pi 3 B+

            1 Reply Last reply Reply Quote 0
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