Hello,  in QNX6.6 for to run the Qt-application I use the next script:
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export LD_LIBRARY_PATH=/lib:/usr/lib:/lib/dll:/opt/qt5/lib:/opt/qnx6/x86/lib:/opt/qnx6/x86/usr:/opt/qnx6/x86/lib/dll
export QQNX_PHYSICAL_SCREEN_SIZE=200, 200
export QT_PLUGIN_PATH=/opt/qt5/plugins
export QML2_IMPORT_PATH=/opt/qt5/qml
export GRAPHICS_ROOT=/usr/lib/graphics/intel-drm

drm-intel
screen
/root/app/my_prog qnx:no-fullscreen
slay screen
slay drm-intel
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On the PC, after the close of my program, screen completed its work. But  drm-intel  no exited.
Because of what it could be?

On Vmware, when I use instead of drm-intel - vmware (though it is not explicitly called in a script), screen shuts down 
and I can continue to work with mqc.

Thanks
Vova