EGLFS problems with Qt 5.9

eglimi

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!

eglimi

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

Eddy

@eglimi
Thanks for posting your solution back to us!

Have a nice weekend