2019.1.0f2 Seconday Display Canvas Scale Problem

Hello,

I try to proof of concept for main and secondary display application based on Windows platform. I made this before but I saw a big problem on Unity3d 2019.1. On the editor side, there is no problem for Canvas UI elements and scale operation. I can see perfectly all UI items for defined cameras. But Unity3d 2019.1 scale wrongly when I build it. the same project works perfectly on unity3d 2018.

I tested small code on Unity3d 2019.1.0f2 and 2018.3.0f2 versions. results are different.

you can reference at the images. Unity3d make the wrong scale for 2019.1 version for a secondary display.



Code is below

Code (CSharp):

1.     void Start()
2.     {
3.         Screen.SetResolution(5760, 1080, FullScreenMode.FullScreenWindow, 60);
4.  
5.         if (Display.displays.Length > 1)
6.         {
7.             Display.displays[1].Activate(1920, 1080, 60);
8.             Display.displays[1].SetRenderingResolution(1920, 1080);
9.         }
10.     }

 

Update Unity3d 2019.1.0f1 still same.
Screen Shorts at the attachment Unity3d 2018 work well but 2019 make problem on Canvas Scaler.

İt looks a unity3d bug.

test code

Code (CSharp):

1.     public Text Res;
2.     public Text Refr;
3.     // Start is called before the first frame update
4.     void Start()
5.     {      
6.         if (Display.displays.Length > 1)
7.         {
8.             Display.displays[1].Activate();          
9.         }
10.     }
11.  
12.     // Update is called once per frame
13.     void Update()
14.     {
15.         Res.text = "renderingWidth - renderingHeight :" + Display.displays[1].renderingWidth.ToString() + " - " + Display.displays[1].renderingHeight.ToString();
16.         Refr.text = "systemWidth - systemHeight : " +  Display.displays[1].systemWidth.ToString() + " - " + Display.displays[1].systemHeight.ToString();
17.     }

 

its works normal when i disable surrond.
my normal setup is below

3 monitor surround : total resulation is 5760x1080
1 monitor accesory : total resulation is 1920x1080

After apply surround, its wrongly scale on unity3d 2019 but works on 2018

 

problem solved when I change DirectX11 to DirectX12.
but DirectX12 still experimental on Unity3d. I think its a deep issue. Do you have any idea about this?

 

We have the same issue. In our case we have a multi display setup with mixes in portrait and lanscape. Since Unity 2019.1 it only works correct for 1 orientation and not for the other one, the canvas scaler is definitely broken here. Same project works fine with Unity 2018.3.

 

I can confirm that by using DirectX12 this issue is fixed. But by using the experimental DirectX12 I ran into a lot of other issues. For example, multi display camera's dont work anymore.