EGLFS problems with Qt 5.9



  • Hi,

    I deploy my program on a TI AM3359 board and use the EGLFS backend. Until Qt 5.8, this worked fine. I now tried with Qt 5.9 and get the following error after starting the program.

    QDebug: EGL library doesn't support Emulator extensions
    Aborted
    

    Compilation does not produce any errors. Here is the relevant output of the configuration step.

    EGL .................................... yes                                                                                                                                                                                          OpenVG ................................. no                                                                                                                                                                                           OpenGL:                                                                                                                                                                                                                                 Desktop OpenGL ....................... no                                                                                                                                                                                         
        OpenGL ES 2.0 ........................ yes                                                                                                                                                                                        
        OpenGL ES 3.0 ........................ no                                                                                                                                                                                         
        OpenGL ES 3.1 ........................ no                                                                                                                                                                                         
      Session Management ..................... yes                                                                                                                                                                                        
    Features used by QPA backends:                                                                                                                                                                                                        
      evdev .................................. yes                                                                                                                                                                                        
      libinput ............................... no                                                                                                                                                                                         
      mtdev .................................. no                                                                                                                                                                                         
      tslib .................................. yes                                                                                                                                                                                        
      xkbcommon-evdev ........................ no                                                                                                                                                                                         
    QPA backends:                                                                                                                                                                                                                         
      DirectFB ............................... no                                                                                                                                                                                         
      EGLFS .................................. yes                                                                                                                                                                                        
      EGLFS details:                                                                                                                                                                                                                      
        EGLFS i.Mx6 .......................... no                                                                                                                                                                                         
        EGLFS i.Mx6 Wayland .................. no                                                                                                                                                                                         
        EGLFS EGLDevice ...................... no                                                                                                                                                                                         
        EGLFS GBM ............................ no                                                                                                                                                                                         
        EGLFS Mali ........................... no                                                                                                                                                                                         
        EGLFS Raspberry Pi ................... no                                                                                                                                                                                         
        EGL on X11 ........................... no 
    

    Does anybody has any ideas what could be wrong?

    Many thanks in advance!



  • I found a solution with the help of the following bug report

    https://bugreports.qt.io/browse/QTBUG-61156

    The problem is that the build system does not select the correct eglfs backend. In my case, the solution was to export

    QT_QPA_EGLFS_INTEGRATION=none


  • Moderators

    @eglimi
    Thanks for posting your solution back to us!

    Have a nice weekend


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