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[Joris van der Hoeven <address@hidden>]

> How does it determine which numbered modifier is which named modifier,
> then? Can you please give me a headstart and point me to the right
> file? Thanks.

The current keyboard handling is done in

        src/Window/X/x_init.cpp
        src/Window/X/x_loop.cpp

and especially in the following routine:

string
x_display_rep::look_up_key (XKeyEvent* ev) {
  KeySym key= 0;
  XLookupString (ev, NULL, 0, &key, NULL);
  string s= ((ev->state&3)? upper_key [key]: lower_key [key]);
  if ((N(s)>=2) && (s[0]=='K') && (s[1]=='-')) s= s (2, N(s));

  /* other keyboard modifiers */
  if (N(s)==0) return s;
  if (ev->state&4) s= "C-" * s;
  if (ev->state&8) s= "Mod1-" * s;
  if (ev->state&16) s= "Mod2-" * s;
  if (ev->state&32) s= "Mod3-" * s;
  if (ev->state&64) s= "Mod4-" * s;
  if (ev->state&128) s= "Mod5-" * s;
  // cout << "key press: " << s << LF;
  return s;
}

Apparently, when you press the Windows key, then the state becomes 72,
with the bugged version of X.