bug#25204: 25.1.50; I can't change the scroll-lock setting when Emacs has the focus

[Eli Zaretskii]

> From: Dani Moncayo <dmoncayo@gmail.com>
> Date: Thu, 15 Dec 2016 17:22:18 +0100
> Cc: 25204@debbugs.gnu.org
> 
> >> When Emacs has the focus, pressing the <scroll> key (usually labelled
> >> "scroll lock") has no effect, i.e., if scroll-lock was enabled at that
> >> moment, it remains enabled (and vice-versa).
> >
> > When I do that, I see Emacs bitching at me, saying that <scroll> is
> > undefined.  Don't you see that?
> 
> Yes, I do.  And the scroll-lock led of my keyboard blinks as if the
> setting was changed but restored after a fraction of a second.

That's the intended behavior, since Emacs receives and by default
ignores that key.

Why is that a problem?  What did you expect this key to do inside
Emacs, when it is not bound to any key?  AFAIK, it has no system-wide
default behavior, each application does whatever it pleases with it.