I want one window to loose mouse focus (its a game, and alt-tab doesnt work as it should).
There is this interesting commit that i reached with searching and reading, but dont know how to use DeaGrb feature.
Edit1:
There are some applications(games mostly) which exclusively grab mouse focus, and if you press alt-tab, your mouse focus wont switch to another window, I want to force such applications to release all focus they have, i think that AllowDeactivateGrabs
config var in X server should have similar effect, but it is deprecated...
Edit2: @poolie, no it is not duplicate question, it is releated, but definetely not duplicate
I'm not an X expert, but I don't think that patch is really relevant to having different focus behaviour between different windows.
If you are asking for just some windows to use focus-follows-mouse, you can probably configure that into a sufficiently flexible window manager. It might be possible in Compiz; it's almost certainly possible in Sawfish.
If your problem is just that the game uses Alt-tab for its own purposes, you can just remove that from the Ubuntu Keyboard Shortcuts configuration window.