xmodmap xinput teclas cambiar funcion bind i3

gistfile1.txt

$   xinput list 
xinput list
⎡ Virtual core pointer                    	id=2	[master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer              	id=4	[slave  pointer  (2)]
⎜   ↳ SynPS/2 Synaptics TouchPad              	id=11	[slave  pointer  (2)]
⎣ Virtual core keyboard                   	id=3	[master keyboard (2)]
    ↳ Virtual core XTEST keyboard             	id=5	[slave  keyboard (3)]
    ↳ Power Button                            	id=6	[slave  keyboard (3)]
    ↳ Power Button                            	id=7	[slave  keyboard (3)]
    ↳ Sleep Button                            	id=8	[slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard            	id=10	[slave  keyboard (3)]
    ↳ Logitech USB Headset Logitech USB Headset	id=9	[slave  keyboard (3)]
$ xinput test 10
key press   122 
key release 122 
key press   123 
key release 123 
key press   174 
key release 174 
key press   172 
key release 172 
key press   173 
key release 173 
key press   171 
key release 171

Lista las funciones actuales:
xmodmap -pke
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What can xmodmap do?

xmodmap is only for remapping keys, for apps running under X11. That's it.

    xmodmap cannot set a key to type key combinations such as Ctrl+c
    xmodmap cannot set a key to run a script.
    xmodmap key cannot change key based on which is current app.
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http://xahlee.info/linux/linux_keyboard_tools.html
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al final resulto que en el  archivo de config de i3  ~/.config/i3/config, podemos bindear la "tecla" mediante su código:
bindcode $mod+34 ...etc...

Acer 5672WLMI a 13 yo laptop, some button labels doesn't exist anymore:
Extra buttons (near power btn):
P:157 | e:156 | www:158 | otro:163

Media buttons:
???: 123
???: 122
???: 172
stop: 174
???: 171
???: 173

Euro & Dollar keys are not even detected