This question is similar to:
https://askubuntu.com/questions/33751/making-any-key-into-a-modifier-key
I have a machine with a non-standard keyboard layout (lenovo x1 carbon) where the CapsLock key has been replaced by Home, End. I'm used to mapping CapsLock as control, so I used xmodmap to map Home, End to Control:
xmodmap -e 'keycode 110 = Control_L' # Home
xmodmap -e 'keycode 115 = Control_L' # End
When I press Home (or End) alone, the correct keysym is detected:
state 0x0, keycode 110 (keysym 0xffe3, Control_L), same_screen YES,
But I am not able to use the remapped Home or End key as a modifier of any other key: when I press Control+a, the a key is not modified:
KeyPress event, serial 36, synthetic NO, window 0x1000001,
root 0xe0, subw 0x0, time 15157752, (829,406), root:(830,407),
state 0x0, keycode 110 (keysym 0xffe3, Control_L), same_screen YES,
XKeysymToKeycode returns keycode: 37
XLookupString gives 0 bytes:
XmbLookupString gives 0 bytes:
XFilterEvent returns: False
KeyPress event, serial 36, synthetic NO, window 0x1000001,
root 0xe0, subw 0x0, time 15157761, (829,406), root:(830,407),
state 0x0, keycode 38 (keysym 0x61, a), same_screen YES,
XLookupString gives 1 bytes: (61) "a"
XmbLookupString gives 1 bytes: (61) "a"
XFilterEvent returns: False
KeyRelease event, serial 36, synthetic NO, window 0x1000001,
root 0xe0, subw 0x0, time 15157912, (829,406), root:(830,407),
state 0x0, keycode 38 (keysym 0x61, a), same_screen YES,
XLookupString gives 1 bytes: (61) "a"
XFilterEvent returns: False
KeyRelease event, serial 36, synthetic NO, window 0x1000001,
root 0xe0, subw 0x0, time 15157949, (829,406), root:(830,407),
state 0x0, keycode 110 (keysym 0xffe3, Control_L), same_screen YES,
XKeysymToKeycode returns keycode: 37
XLookupString gives 0 bytes:
XFilterEvent returns: False
Whereas if I use a "real" control key, the "a" key press has a control modifier state:
KeyPress event, serial 36, synthetic NO, window 0x1000001,
root 0xe0, subw 0x0, time 15160488, (829,406), root:(830,407),
state 0x0, keycode 37 (keysym 0xffe3, Control_L), same_screen YES,
XLookupString gives 0 bytes:
XmbLookupString gives 0 bytes:
XFilterEvent returns: False
KeyPress event, serial 36, synthetic NO, window 0x1000001,
root 0xe0, subw 0x0, time 15161477, (829,406), root:(830,407),
state 0x4, keycode 38 (keysym 0x61, a), same_screen YES,
XLookupString gives 1 bytes: (01) ""
XmbLookupString gives 1 bytes: (01) ""
XFilterEvent returns: False
KeyRelease event, serial 36, synthetic NO, window 0x1000001,
root 0xe0, subw 0x0, time 15161588, (829,406), root:(830,407),
state 0x4, keycode 38 (keysym 0x61, a), same_screen YES,
XLookupString gives 1 bytes: (01) ""
XFilterEvent returns: False
KeyRelease event, serial 36, synthetic NO, window 0x1000001,
root 0xe0, subw 0x0, time 15161842, (829,406), root:(830,407),
state 0x4, keycode 37 (keysym 0xffe3, Control_L), same_screen YES,
XLookupString gives 0 bytes:
XFilterEvent returns: False
Is it possible to configure the Home key in my case as a Control modifier key? Or is there some hardware limitation that prevents this?
/usr/share/X11/xkb/symbols/
directory. unix.stackexchange.com/questions/478315/…