Joseph Vidal-Rosset <joseph.vidal.rosset@gmail.com> writes:

> Hello everybody,
>
> I apologize,  I know  that this  topic is org-mode  specific, but  it is
> related to emacs.
>
> My problem is exactly the same that is explained here :
> [[https://github.com/syl20bnr/spacemacs/issues/9691]]
> and my OS  is the same (Gnu Linux  Debian 9).  I do not  succeed to find
> the solution,  knowing that I need  to copy and paste  in emacs elements
> that are outside emacs.
>
> Your help is welcome. 

FWIW, this is a known issue.
See https://debbugs.gnu.org/cgi/bugreport.cgi?bug=29170

I use the same workaround a S. Fraga:
: (setq x-selection-timeout 10)

Best,