Method HandleKeyEvent handles events 1 and 0 (press and release, respectively). It needs to handle 2 (hold) as well.

https://github.com/Noesis/Managed/blob/master/Src/NoesisApp/Displays/Gbm/Src/LibEvdev.cs#L755
https://github.com/Noesis/Managed/blob/master/Src/NoesisApp/Displays/Fbdev/Src/LibEvdev.cs#L755

It should be something like this:

private static void HandleKeyEvent(InputEvent ev)

{

// 0 = Key up/released

// 1 = Key down/pressed

// 2 = Key hold/repeating

Key key = _keyMap[ev.code];

if (key != Key.None)

{

if (ev.value == 0)

{

KeyUp?.Invoke(key);

}

else if (ev.value == 1 || ev.value == 2)

{

KeyDown?.Invoke(key);

}

}

}

Tested and verified that ev.value comes through as 2 when holding down a key on a USB Keyboard.