GNU Emacs lives, but dead key events aren't accepted anymore

[Peter Dyballa]

Hello!

I had to reboot my Mac one week ago, and now *all* X client Emacsen  
(22.1.50...23.0.60) claim:

        <dead-tilde> is undefined
        <dead-circumflex> is undefined
        <dead-acute> is undefined
        <dead-diaeresis> is undefined
        <S-dead-grave> is undefined
        <S-dead-circumflex> is undefined

Xev explains, on pressing ~ (which indeed is pressing the alt key  
[Mode_switch] and n):

        KeyPress event, serial 21, synthetic NO, window 0x1600001,
            root 0x57, subw 0x0, time 389703539, (1048,423), root:(1050,445),
	    state 0x0, keycode 66 (keysym 0xff7e, Mode_switch), same_screen  
YES,
            XLookupString gives 0 bytes:
            XmbLookupString gives 0 bytes:
            XFilterEvent returns: False
        
        KeyPress event, serial 23, synthetic NO, window 0x1600001,
            root 0x57, subw 0x0, time 389704095, (1048,423), root:(1050,445),
            state 0x8, keycode 53 (keysym 0xfe53, dead_tilde), same_screen YES,
            XLookupString gives 1 bytes: (7e) "~"
            XmbLookupString gives 0 bytes:
            XFilterEvent returns: True
        
        KeyRelease event, serial 23, synthetic NO, window 0x1600001,
            root 0x57, subw 0x0, time 389704146, (1048,423), root:(1050,445),
            state 0x8, keycode 53 (keysym 0xfe53, dead_tilde), same_screen YES,
            XLookupString gives 1 bytes: (7e) "~"
        
        KeyRelease event, serial 23, synthetic NO, window 0x1600001,
            root 0x57, subw 0x0, time 389705355, (1048,423), root:(1050,445),
	    state 0x8, keycode 66 (keysym 0xff7e, Mode_switch), same_screen  
YES,
            XLookupString gives 0 bytes:

or for ^:

        KeyPress event, serial 21, synthetic NO, window 0x1600001,
            root 0x57, subw 0x0, time 389788659, (832,608), root:(834,630),
	    state 0x0, keycode 18 (keysym 0xfe52, dead_circumflex),  
same_screen YES,
            XLookupString gives 1 bytes: (5e) "^"
            XmbLookupString gives 0 bytes:
            XFilterEvent returns: True
        
        KeyRelease event, serial 23, synthetic NO, window 0x1600001,
            root 0x57, subw 0x0, time 389788913, (832,608), root:(834,630),
	    state 0x0, keycode 18 (keysym 0xfe52, dead_circumflex),  
same_screen YES,
            XLookupString gives 1 bytes: (5e) "^"
        
        KeyPress event, serial 23, synthetic NO, window 0x1600001,
            root 0x57, subw 0x0, time 389790846, (832,608), root:(834,630),
            state 0x0, keycode 57 (keysym 0x20, space), same_screen YES,
            XLookupString gives 1 bytes: (20) " "
            XmbLookupString gives 1 bytes: (20) " "
            XFilterEvent returns: True
        
        KeyPress event, serial 23, synthetic NO, window 0x1600001,
            root 0x57, subw 0x0, time 389790846, (832,608), root:(834,630),
            state 0x0, keycode 0 (keysym 0x5e, asciicircum), same_screen YES,
            XLookupString gives 1 bytes: (00) ""
            XmbLookupString gives 1 bytes: (5e) "^"
            XFilterEvent returns: False

        KeyRelease event, serial 23, synthetic NO, window 0x1600001,
            root 0x57, subw 0x0, time 389790954, (832,608), root:(834,630),
            state 0x0, keycode 57 (keysym 0x20, space), same_screen YES,
            XLookupString gives 1 bytes: (20) " "

Xmodmap -pk shows (a bit edited):

     18    0xfe52 (dead_circumflex)	0x00b0 (degree)		0x0afe  
(doublelowquotemark)	0x0ad2	  (leftdoublequotemark)	
     30    0x0036 (6)			0x0026 (ampersand)	0x005d (bracketright)		 
0xfe52 	  (dead_circumflex)	
     32    0xfe51 (dead_acute)		0xfe50 (dead_grave)	0x0027  
(apostrophe)		0x10002da (U02DA)	
     40    0x0075 (u)			0x0055 (U)		0xfe57 (dead_diaeresis)		 
0x00c1	  (Aacute)	
     53    0x006e (n)			0x004e (N)		0xfe53 (dead_tilde)		0x100203a  
(U203A)	
     66    0xff7e (Mode_switch) 

The C header file keysymdef.h contains inside the "ISO 9995 Function  
and Modifier Keys, Byte 3 = 0xFE" group:

        #ifdef XK_XKB_KEYS
        #define XK_dead_grave                                   0xFE50
        #define XK_dead_acute                                   0xFE51
        #define XK_dead_circumflex                              0xFE52
        #define XK_dead_tilde                                   0xFE53
        #define XK_dead_diaeresis                               0xFE57
        #endif


There does not seem to be any change that *I* could notice. Xterm  
still sees the characters, and GNU Emacs without windows in xterm  
sees them also. What could have caused such a change for the X11  
clients? Probably something in ~/.emacs, when all show it ...

--
Greetings

  Pete

A lot of people mistake a short memory for a clear conscience.
                                – Doug Larson