Could you provide the version of the Software of your module? Which Qt Version are u using? Can you check if the application is running on the module (by copying and running manually)?
angstrom-qt5-x11-image version 2.7b5,
QT (embedded) version 5.7.1,
QT Creator version 3.5.1,
Ubuntu 16.04
Application is running on the module. If I press “Run” button, application is successfully loaded into module. I can see application window on display connected to aster carrier board.
I don’t think that the warning libEGL warning: DRI2: failed to authenticate is related to the issue you are seeing. It probably is printed because Qt tries to use the EGL backend, which fails. But since the application seems to work, it probably falls back to the correct QPA.
As far as I can tell, when you press the Run button, everything is fine correct? So you only have issues when using Debug? How does it exactly fail in that case?
Can you try specifying the QPA backend by setting the environment variable QT_QPA_PLATFORM to xcb.