[patch at end] [Sorry for replying so late, I have been in culinary heaven, i.e. Japan. Since XEmacs 21.0 is not out of the door yet I believe it can and should be fixed] Martin Buchholz <martin(a)xemacs.org&gt; writes 3 weeks ago: Personally is I do not really think it is relevant whether or not XEmacs is incorrect. XEmacs is behaving differently from xterm/XIM/other apps which is what matters. They all accept keysyms even if another keysym on the generating key is a modifier. Dunno, isn't that something for X to worry about, not XEmacs? Basically. I think we should do it something like this (I moved the behavior to the x_to_emacs_keysym function since it doesn't require duplication of the XlookupString calls). 1998-07-16 Jan Vroonhof <vroonhof(a)math.ethz.ch&gt; * event-Xt.c (x_to_emacs_keysym): Return nil for modifier keysyms. (x_event_to_emacs_event): Let x_to_emacs_keysym check for modifier keys thus no longer considering all keysyms on a key. Index: event-Xt.c =================================================================== RCS file: /usr/CVSroot/XEmacs/xemacs-20/src/event-Xt.c,v retrieving revision 1.41 diff -u -u -r1.41 event-Xt.c --- event-Xt.c 1998/06/20 00:58:46 1.41 +++ event-Xt.c 1998/07/17 03:09:56 ＠＠ -769,7 +769,7 ＠＠ /* simple_p means don't try too hard (ASCII only) */ { KeySym keysym = 0; - + #ifdef HAVE_XIM int len; char buffer[64]; ＠＠ -794,7 +794,8 ＠＠ than passing in 0) to avoid crashes on German IRIX */ char dummy[256]; XLookupString (event, dummy, 200, &keysym, 0); - return x_keysym_to_emacs_keysym (keysym, simple_p); + return (IsModifierKey (keysym) || keysym == XK_Mode_switch ) + ? Qnil : x_keysym_to_emacs_keysym (keysym, simple_p); } #endif /* ! XIM_MOTIF */ ＠＠ -843,7 +844,8 ＠＠ { case XLookupKeySym: case XLookupBoth: - return x_keysym_to_emacs_keysym (keysym, simple_p); + return (IsModifierKey (keysym) || keysym == XK_Mode_switch ) + ? Qnil : x_keysym_to_emacs_keysym (keysym, simple_p); case XLookupChars: { ＠＠ -983,20 +985,16 ＠＠ { Lisp_Object keysym; XKeyEvent *ev = &x_event->xkey; - KeyCode keycode = ev->keycode; - - if (x_key_is_modifier_p (keycode, d)) /* it's a modifier key */ - return 0; - /* This used to compute the frame from the given X window and store it here, but we really don't care about the frame. */ emacs_event->channel = DEVICE_CONSOLE (d); keysym = x_to_emacs_keysym (&x_event->xkey, 0); - /* If the emacs keysym is nil, then that means that the - X keysym was NoSymbol, which probably means that - we're in the midst of reading a Multi_key sequence, - or a "dead" key prefix, or XIM input. Ignore it. */ + /* If the emacs keysym is nil, then that means that the X + keysym was either a Modifier or NoSymbol, which + probably means that we're in the midst of reading a + Multi_key sequence, or a "dead" key prefix, or XIM + input. Ignore it. */ if (NILP (keysym)) return 0;