[FIXED] Unity, problem with android build on 120hz devices

Issue

I'm working on simple 2d project, sprites run from top to bottom and on standard phones (60hz) everything look smooth, but on s20+ (exynos 990 version) with 120hz on, sprites start gently tug, jumps, loosing smoothness. when i turn off 120hz refresh rate, game work perfect. at first move was based on while loop with yield return new WaitForEndOfFrame(); and that was causing another problem. if it was based on frames whole move was 2x faster, and game was unplayable. so i decided to build movement on void Update(), and turn on vSync, that solve 2x speed problem but it doesn't help with smooth lose,

I was trying to limit frame rate to 60 by Application.targetFrameRate = 60; with vSync on 0, same result.

so my question is: Is there any possibility to do something with it? Can i somehow tell phone to turn off 120hz refresh for time when my app is running? or maybe there is some option in unity settings that i don't know about, which can solve my misery. I'm really on the edge of mental breakdown now.

Solution

Try this (to turn on 120hz display mode):

1. Create file "MainActivity.java" in Assets folder.

2. Open this file and paste code:

package com.*YOUR COMPANY NAME*.*YOUR PRODUCT NAME*;
import com.unity3d.player.UnityPlayerActivity;
import android.os.Bundle;
import android.os.Build;
import android.view.Display;
import android.view.Window;
import android.view.WindowManager;
public class MainActivity extends UnityPlayerActivity {
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
            Window w = getWindow();
            WindowManager.LayoutParams p = w.getAttributes();
            Display.Mode[] modes = getDisplay().getSupportedModes();
            //find display mode with max hz
            int maxMode = 0;
            float maxHZ = 60f;
            for(Display.Mode m:modes) {
                if (maxHZ < m.getRefreshRate()) {
                    maxHZ = m.getRefreshRate();
                    maxMode = m.getModeId();
                }
            }
            p.preferredDisplayModeId = maxMode;
            w.setAttributes(p);
        }
  }
}

3. Change *YOUR COMPANY NAME* and *YOUR PRODUCT NAME* to Company Name and Product Name from Project Settings -> Player.

4. Go to Project Settings -> Player -> Publishing Settings. Tick "Custom Main Manifest".

5. Open file "AndroidManifest.xml" in "Assets\Plugins\Android".

6. Change android:name=com.unity3d.player.UnityPlayerActivity to android:name=com.*YOUR COMPANY NAME*.*YOUR PRODUCT NAME*.MainActivity.

7. Be sure to call Application.targetFrameRate = Screen.currentResolution.refreshRate; in any script!

UPDATE: FIXED BUG IN ANDROID 12.

https://forum.unity.com/threads/set-screen-refresh-rate-on-android-11.997247/

Answered By - ComRSMaster
Answer Checked By - Terry (JavaFixing Volunteer)