Xbox 360 wired controller (official) triggers issue

Hi,

I tried calibrating my Xbox 360 wired usb controller using Plasma integrated tool and faced an issue that create problems in certain games requiring pressing smoothly.
When using the triggers on the controller (LT & RT) the values goes between -32767 and 32767 in the chart on the right side of the window but when I’m using the calibration tool the triggers value are between 0 and 255 and that seems better. But when the calibration is finished, the values goes back to the previous ones (32767).

I tried to rmmod xpad and install xboxdrv (from the AUR) then launch it from the console.
Buttons values are shown in the console and LT / RT values are oscillating between 0 and 255, but in the Plasma built-in gamepad tool the value are still between -32767 & 32767.

So it seems Plasma is messing with the values. Is there a simple way, like editing a config file, to force these values.

Thanks for your time.

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