Jittery camera motion in GearVR when moving camera - nothing seems to work.

I have a very simple scene that runs at a very high frame rate, but when I try to make the camera move, the movement is jittery causing it to look like a very low frame rate.

I have read elsewhere about moving the camera in FixedUpdate, LateUpdate, or Update, but nothing seems to work.

I have also tried setting Application.targetFrameRate in Start(), and also QualitySettings.vSyncCount = 0; I have also tried using a normal camera and the OVRCameraRig.

Nothing seems to work from what I have read. In the editor, there doesn't seem to be this problem, only when compiling and running on GearVR (and using a bluetooth joystick to control movement).

Here is the code that I am using to move the camera. The Camera is placed as a child of an empty GameObject with the following script attached to the GameObject:

 using UnityEngine;
 using System.Collections;
 
 public class SimpleCameraMove : MonoBehaviour
 {
     Camera cam;
 
     Vector3 origPos;
     Vector3 pos;
 
     float controllerSpeed = 0.5f;
     float displacement = 0f;
 
     void Start()
     {
         cam = Camera.main;
         origPos = this.transform.position;
     }
 
     void Update()
     {
         displacement += Time.deltaTime * controllerSpeed  * Input.GetAxis("Horizontal");
 
         pos = new Vector3(origPos.x + displacement, origPos.y, origPos.z);
 
         transform.position = pos;
     }
 
 
 
 }

I am sure others must have been having this problem, and I have searched around but none of the solutions I have come across have worked. Please help.