Why libinput debounce state is DEBOUNCE_STATE_DISABLED?

Question

I've installed libinput to enable debounce. I added settings to /etc/libinput/local-overrides.quirks. But it doesn't work. I try to debug libinput with command libinput debug-events --verbose and it says:

event2  - debounce state: DEBOUNCE_STATE_DISABLED → DEBOUNCE_EVENT_OTHERBUTTON → DEBOUNCE_STATE_DISABLED
event2  - debounce state: DEBOUNCE_STATE_DISABLED → DEBOUNCE_EVENT_PRESS → DEBOUNCE_STATE_DISABLED
event2  - debounce state: DEBOUNCE_STATE_DISABLED → DEBOUNCE_EVENT_RELEASE → DEBOUNCE_STATE_DISABLED

So debounce doesn't work and I can't understand why. My local-overrides.quirks:

[DEXIN Tt eSPORTS THERON]
MatchName=DEXIN Tt eSPORTS THERON
ModelBouncingKeys=1

[DEXIN Tt eSPORTS THERON Keyboard]
MatchName=DEXIN Tt eSPORTS THERON Keyboard
ModelBouncingKeys=1

[DEXIN Tt eSPORTS THERON Consumer Control]
MatchName=DEXIN Tt eSPORTS THERON Consumer Control
ModelBouncingKeys=1

[mouse]
MatchUdevType=mouse
ModelBouncingKeys=1

[THERON]
MatchName=*THERON*
ModelBouncingKeys=1

[DEXIN]
MatchName=*DEXIN*
ModelBouncingKeys=1

Answer 1

In your text you meticulously disabled the debounce ☺ Libinput has it enabled by default, and what the ModelBouncingKeys=1 quirk does is it says "bouncing keys for this model are, for whatever weird reason, the normal behavior" (I admit, it may not be immediately clear from the naming, I had to double-check it locally too). IIRC one such example is the virtual mouse pointer in VMWare: it slightly delays the click, and so upon double-clicking clicks get sent very close in time.

When debounce is enabled, instead of DEBOUNCE_STATE_DISABLED you'll see DEBOUNCE_STATE_IS_UP