Joystick/controller not activated on startup

[Beuc]

Hi,

Under GNU/Linux, my joystick isn't working on start-up, even with #2180.
However with Shift+G I can select it. Then, even if skipping calibration, it works correctly.

It seems that the joystick does not fire any event until it is initialized, and typically this line isn't triggered:

renpy/renpy/display/controller.py

Lines 162 to 163 in 302858f

	if ev.type == CONTROLLERDEVICEADDED:
	start(ev.which)

Hot-plugging doesn't seem to help.
It is detected in log.txt.
At first glance this would require explicitly enabling controllers on start-up.
What do you think?

[Beuc]

One note: the reverse seems to happen in the web platform: the controller is not detected on start-up, but when pressing buttons it is immediately detected and activated.
It is not detected without activity on https://html5gamepad.com/ either so I believe this is an html5 limitation.