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[UWP] Input.GetJoystickNames() empty on Start in UWP builds

To reproduce:
1. Open the attached project
2. Connect at least one Controller to the PC the issue is being tested on
3. Launch "test.scene" scene in the editor to make sure the controller is detected
4. Make a UWP build and launch it
Result: Connected controllers are not detected using Input.GetJoystickNames() as they are in the editor

Having Input.GetJoystickNames() in Update() eventually finds the connected controllers.You can test this by setting CheckInUpdate field in "script" script to true

Reproduced on: 5.6.3p3, 2017.1.1p1, 2017.2.0b11, 2017.3.0a7 with .NET and IL2CPP scripting backends

  1. Response avatar

    Resolution Note:

    This issue is due to a race-condition between the Windows device enumerator and the GetJoystickNames() method. That is, retrieving device names before enumeration completes returns an incomplete list, but there isn't a good solution to fix it for the Unity API.

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