Runtime discovery and activation of subsystems

Add the following script to your project in order to scan for and create or start a Display subsystem with the id of Display0. You can change the match variable if you want to load other Display subsystems:

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Experimental.XR;
using UnityEngine.XR;

public class Display : MonoBehaviour
{
    public string match = "Display0";

    // Use this for initialization
    void Start ()
    {
        List<XRDisplaySubsystemDescriptor> displays = new List<XRDisplaySubsystemDescriptor>();
        SubsystemManager.GetSubsystemDescriptors(displays);
        Debug.Log("Number of display providers found: " + displays.Count);

        foreach (var d in displays)
        {
            Debug.Log("Scanning display id: " + d.id);

            if (d.id.Contains(match))
            {
                Debug.Log("Creating display " + d.id);
                XRDisplaySubsystem dispInst = d.Create();

                if (dispInst != null)
                {
                    Debug.Log("Starting display " + d.id);
                    dispInst.Start();
                }
            }
        }
    }
}

The XR Management package is the user-facing UI(User Interface) Allows a user to interact with your application. Unity currently supports three UI systems. More info
See in Glossary used to configure loading of subsystems at runtime. It uses the same underlying APIs (described above) to create and manage subsystems. If you want your provider to show up in the XRAn umbrella term encompassing Virtual Reality (VR), Augmented Reality (AR) and Mixed Reality (MR) applications. Devices supporting these forms of interactive applications can be referred to as XR devices. More info
See in Glossary Settings UI, write an XRLoader.

If your plug-inA set of code created outside of Unity that creates functionality in Unity. There are two kinds of plug-ins you can use in Unity: Managed plug-ins (managed .NET assemblies created with tools like Visual Studio) and Native plug-ins (platform-specific native code libraries). More info
See in Glossary fails to load, see the troubleshooting section below.

Troubleshooting plug-in discovery at runtime

To troubleshoot the initialization or starting of your subsystem Provider, check the editor log or player output log for lines that start with [XR] or [Subsystems].

No subsystems found in C#

If you just added a .json and plug-in files, make sure you relaunch Unity. Currently, Unity only discovers these files at start-up. Also, make sure that the Provider uses the correct file layout.

Errors finding and parsing the UnitySubsystemsManifest.json file

Errors finding and loading the provider plug-in

Errors initializing the provider