Program not responding notification is popping up too quickly

[Ponce-De-Leon]

@Zorro

Edit: Or if it does not work, there is another alternative further down that uses dconf-editor.

I've take a Look at dconf-editor and it is really there:

You have to click on the check-alive-timeout Entry and then it opens the Setup Window for it. There You have to scroll down, turn off the Toggle and change the Time (ms) and then click on the Apply Button: