Start Qt Application without going through a window manager

nwoki

I do not use a Desktop manager and I don't want to
I want my application to start ONLY X server and nothing else

Is there a way to actually acheive this or am i missing something?

artwaw

Hi,
it possible that I am missing something here but I my solution would be two-fold:

small deamon-like program that actually monitors if target app is running and if requirements for it to run are met;
target app (your main program) that runs in front the way you like.

SGaist

Hi,

Then shouldn't you rather avoid X altogether and use Qt for Embedded Linux ?

nwoki

@SGaist said in Start Qt Application without going through a window manager:

Hi,

Then shouldn't you rather avoid X altogether and use Qt for Embedded Linux ?

Why? The application is running on a normal pc. Anyway, I'll stick to using kwin_x11 and figure something out

SGaist

Embedded doesn't mean it should be credit card size, an ATM is a sort of embedded system even if its locked in a wall.

From your description, it looks like your system should be some sort of kiosk since you don't want any window manager hence my suggestion of using one of the other backends available. This will also have the advantage of reducing the requirements and dependencies of your system.

bask185

I also have a window-less GUI application on ubuntu. To get rid of the window manager I made a new desktop which auto launches the app.

However if it crashes, it does not restart and I still did not manage to prevent the display from going to sleep after x minutes. But I do not expect my application to crash on my target system. This might be a solution?

SGaist

@bask185 What might be a solution ?

nwoki

@SGaist said in Start Qt Application without going through a window manager:

Embedded doesn't mean it should be credit card size, an ATM is a sort of embedded system even if its locked in a wall.

From your description, it looks like your system should be some sort of kiosk since you don't want any window manager hence my suggestion of using one of the other backends available. This will also have the advantage of reducing the requirements and dependencies of your system.

Sorry for the late reply.

Yeah, I looked that up but didn't think it was necessary and that maybe there was another way. I'll try the eglfs platform plugin (via the -platform eglfs switch) and see if it does what I expect it to. I'll get back to you

nwoki

In the end i'm using matchbox and launching the application with the -platform eglfs flag activated. There's no way in getting the app to run directly on X (which is what I wanted to achieve in the beginning) so I'm going with a very slim window manager.

SGaist

Then you need the xcb backend.