I've just tried this latest configuration. It doesn't change the behavior of the incriminated application but now no modifiers
Space key alone in xev :
KeyRelease event, serial 31, synthetic NO, window 0x2200001, root 0x13b, subw 0x0, time 550680493, (85,98), root:(1666,147), state 0x10, keycode 65 (keysym 0x20, space), same_screen YES, XLookupString gives 1 bytes: (20) " " XFilterEvent returns: False
Left control + space :
KeyPress event, serial 31, synthetic NO, window 0x2200001, root 0x13b, subw 0x0, time 550711435, (91,86), root:(1672,135), state 0x10, keycode 37 (keysym 0xffe3, Control_L), same_screen YES, XLookupString gives 0 bytes: XmbLookupString gives 0 bytes: XFilterEvent returns: False
KeyPress event, serial 31, synthetic NO, window 0x2200001, root 0x13b, subw 0x0, time 550714067, (91,86), root:(1672,135), state 0x14, keycode 65 (keysym 0x0, NoSymbol), same_screen YES, XLookupString gives 0 bytes: XmbLookupString gives 0 bytes: XFilterEvent returns: False
Right control + space :
KeyPress event, serial 31, synthetic NO, window 0x2200001, root 0x13b, subw 0x0, time 550783309, (88,289), root:(1669,338), state 0x10, keycode 109 (keysym 0xffe4, Control_R), same_screen YES, XLookupString gives 0 bytes: XmbLookupString gives 0 bytes: XFilterEvent returns: False
KeyPress event, serial 31, synthetic NO, window 0x2200001, root 0x13b, subw 0x0, time 550784541, (88,289), root:(1669,338), state 0x14, keycode 65 (keysym 0x0, NoSymbol), same_screen YES, XLookupString gives 0 bytes: XmbLookupString gives 0 bytes: XFilterEvent returns: False
I've just tried this latest configuration.
It doesn't change the behavior of the incriminated application but now no modifiers
Space key alone in xev :
KeyRelease event, serial 31, synthetic NO, window 0x2200001,
root 0x13b, subw 0x0, time 550680493, (85,98), root:(1666,147),
state 0x10, keycode 65 (keysym 0x20, space), same_screen YES,
XLookupString gives 1 bytes: (20) " "
XFilterEvent returns: False
Left control + space :
KeyPress event, serial 31, synthetic NO, window 0x2200001,
root 0x13b, subw 0x0, time 550711435, (91,86), root:(1672,135),
state 0x10, keycode 37 (keysym 0xffe3, Control_L), same_screen YES,
XLookupString gives 0 bytes:
XmbLookupString gives 0 bytes:
XFilterEvent returns: False
KeyPress event, serial 31, synthetic NO, window 0x2200001,
root 0x13b, subw 0x0, time 550714067, (91,86), root:(1672,135),
state 0x14, keycode 65 (keysym 0x0, NoSymbol), same_screen YES,
XLookupString gives 0 bytes:
XmbLookupString gives 0 bytes:
XFilterEvent returns: False
Right control + space :
KeyPress event, serial 31, synthetic NO, window 0x2200001,
root 0x13b, subw 0x0, time 550783309, (88,289), root:(1669,338),
state 0x10, keycode 109 (keysym 0xffe4, Control_R), same_screen YES,
XLookupString gives 0 bytes:
XmbLookupString gives 0 bytes:
XFilterEvent returns: False
KeyPress event, serial 31, synthetic NO, window 0x2200001,
root 0x13b, subw 0x0, time 550784541, (88,289), root:(1669,338),
state 0x14, keycode 65 (keysym 0x0, NoSymbol), same_screen YES,
XLookupString gives 0 bytes:
XmbLookupString gives 0 bytes:
XFilterEvent returns: False