Blank screen in RaspberryPi

  • 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? :(

  • 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.

  • Lifetime Qt Champion

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

  • eglfs. device is a raspberry pi 3 B+

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