When calling

      (select-frame-set-input-focus some-frame)

the frame is raised, but does not recieve the focus. I have to call 
twice to 'select-frame-set-input-focus' for the frame to get
focused. Docs says "focused if possible", so I am not sure if it some
bug or/and how much does it depend on my window manager used; but
calling it twice consecutively works.

I have attached an example code. To reproduce, emacs -Q, an eval
attached code.

If I missunderstand docs, or am calling it wrongly, dissregard the
rapport plz :-).