I want activate by default disable to enable surface presentation from third-party application in certain case.

I disable activate by default by adding "activate-by-default=false" to "/etc/xdg/weston/weston.ini".

I have reproduced this issue with:
1) agl-demo-platform image
2) agl-weston-image. I this case I run custom agl shell client to set background and instruct agl-compositor to start presenting ( simple-agl-shell.c ). Attached logs are related to this case.

I weston-simple-egl with a very small modification, that I added

xdg_toplevel_set_app_id(window->xdg_toplevel, "simple-egl");

after xdg_toplevel_set_title.

Then I run

agl-shell-activator simple-egl

The problem is that weston-simple-egl surface does not show up.

Without "activate-by-default=false" running weston-simple-egl works fine.