How can I disable the message :
"your application" is not responding
on Linux, Fedora ? When the message pop up I'm still able to play the game in the background

How can I disable the message :
"your application" is not responding
on Linux, Fedora ? When the message pop up I'm still able to play the game in the background

If this is a gnome based app, as it looks like, the function named delete_ping_timeout_func is called whenever a timeout happens to show this popup.
The timeout is defined in the mutter source and is not configurable without recompiling the library as shown here.
#define PING_TIMEOUT_DELAY 5000
Use this extension to remove the popup. https://extensions.gnome.org/extension/2257/disable-force-quit-or-wait-button/
This is a very anoying popup. I got it during the debug of my application using Gnome3 on Ubuntu. I really search a way to remove it because it freeze the ability to regain focus on another window, and mostly into my debuger.
It is not possible to develop using Gnome3 for now.