Not even those mentioned by Noam work?  I mean these:

  s-y Hide original message
  s-n
  s-[
  s-]
  s-.
  s-`
  s--
  s-;
  s-'
  s-\
Levis >>> Non of them. No one. But these works:C-s-y is undefinedC-s-n is undefinedC-s-] is undefined.... etc
 

    On Wednesday, September 21, 2016 7:45 PM, Eli Zaretskii <eliz@gnu.org> wrote:
 

 > Date: Wed, 21 Sep 2016 17:17:16 +0000 (UTC)
> From: Mambo Levis <mambo.levis@gmail.com>
> Cc: "robert-emacs@cochranmail.com" <robert-emacs@cochranmail.com>, 
>     "24453@debbugs.gnu.org" <24453@debbugs.gnu.org>
> 
> Let me understand what exactly is the nature of the problem: is it
> true that only _some_ hyper- and super- key combinations don't work?
> Or do none of them work in Emacs 25.1?
> 
> Levis >> None of them work in Emacs 25.1 official release. For example, key combinations starting with
> super don't work, but if I make a combination
> such C-super-a (C-s-a) works. It seams that super and hyper can't be triggered as prefix.

Not even those mentioned by Noam work?  I mean these:

  s-y
  s-n
  s-[
  s-]
  s-.
  s-`
  s--
  s-;
  s-'
  s-\