Bad values for joystick input in unity 5

Hi,

I have a "noname" USB joystick and I try to use it in a Unity project. The buttons are working fine, but I have troubles with axis values.

According to Unity5 documention, for each axis, I should get values :

• -1.0 when the axis is pushed to the "minimum" (left for X axis or down for Y axis)

1. when the axis is at center

• +1.0 when the axis is pushed to the "maximum" (right for X axis or up for Y axis)

But I get :

• -1.0 when the axis is at center

1. when the axis is halfway between center and maximum

• +1.0 when the axis is pushed to the "maximum" (right for X axis or up for Y

• +1.0 if the axis is pushed at any position below center

I really don't understand why I get these values :

• when I display the windows joystick calibration UI (run "joy.cpl") the joystick is working fine.

• when I use an existent game, the joystick is working fine

• I tried some joystick test programs found on the internet, each time the joystick is working fine

• I tried some HTML5 joystick test sites, each time the joystick is working fine

But I can't believe there is such a problem in Unity5, so it must be in my code...

Here is a simple test code I use in Unity to display values :

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;

 public class JoystickTest : MonoBehaviour
 {
     public float Position            = 0.0f;

     void Update()
     {
         float value = Input.GetAxis("Player 1");
         Position = value;
     }
 }

And the Unity input manager is configured as follow :

I've tried to play with input manager settings, with windows joystick settings, with my code... no way, the result is still the same : work in any application except in my Unity test project...

On Google, I've found some post about the same problem, but no solution...

Any help will be really appreciated !

Thanks