Is it possible to launch an app with a GUI (in my case it's a Python script using wxPython for GUI) as soon as possible when computer is powered on / when Desktop environment is launched?
And, if possible, without any display of desktop background before, no desktop environment loading screen before, I would like that my app is the first thing displayed, like in a kiosk.
Note1: I could disable the DE, and just run X and my app, but I'd prefer to keep a DE launched, but just not show it at all before my app is launched. Then if the user closes the app, it's good that the Desktop is there
Note2: I use the default Ubuntu desktop environment (is it called Unity?)