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: Wed, 21 Dec 2016 08:55:03 +0100
> Cc: 25204@debbugs.gnu.org
> 
> >> For the record: I've just noticed the following inconsistency:
> >>
> >> The same Emacs (-Q) binary[1] have different behaviors on different
> >> MS-Windows variants.  With w32-scroll-modifier set to nil:
> >> * On Windows 7 and 10,  the scroll-lock key does _not_ toggle the setting.
> >> * On Windows 2003 server,  the scroll-lock key _does_ toggle the setting.
> >
> > I cannot reproduce this here.  I tried on XP and Windows 7, and on
> > both I see the LED blink for a small fraction of a second.  Maybe it's
> > so fast on your systems that you don't notice?
> 
> No.  What you see is the same I see on Windows 7 and 10.  When I said
> that the key "does not toggle the setting", I was referring to the
> final outcome.  But the LED indeed blinks.
> 
> But as I said, from a Windows 2003 server[1], the scroll-lock key
> _does_ toggle the key.  Hence the inconsistency.

There's no inconsistency on my machines, including XP (which is
roughly equivalent to your Windows 2003).  On all of the machines I
tried, the LED blinks and Scroll Lock remains in its previous state,
as long as w32-scroll-modifier is nil.

Maybe that W2003 system has some software installed that causes this?