Screen.SetResolution works but sometimes screen doesn't update

Hi - I'm using Screen.SetResolution() in my Windows 10 build to change resolution. In a co-routine, It changes the resolution, waits 0.5 secs, then re-loads the current scene. But sometimes after it's done, what you see on the screen doesn't get updated...until you move the window the game is running with the mouse, or switch to another application and back, or sometimes just moving the mouse.

It usually works fine, but in maybe like 1 out of 50 times it'll have this problem. The resolution I change to/from doesn't seem to make a difference about when the problem will occur. I'm using Unity 5.6.6f2.

Maybe this is just a Window 10 issue? Thanks for any help!

 

Targeting Windows Standalone. A screenshot wouldn't tell you much - it would just show a black screen. I have a dialog where you can select a resolution from the list of resolutions Screen.resolutions and an "apply" button that calls a coroutine DoResolutionChange(). I cover the screen with a giant black box at the start of DoResolutionChange() to hide the on-screen graphics distortion that happens when you change resolutions, do the resolution change and wait 0.5 secs, then load the Gameplay scene. When the problem happens, what I'm seeing is the black screen when I should be seeing the graphics from the start of my Gameplay scene.

Also I'm using 2D Toolkit, which could be a factor.

Here's the code for DoResolutionChange():

Code (CSharp):

1.  
2.     public IEnumerator DoResolutionChange()
3.     {
4.         // Unhide giant black sprite that covers the screen, makes it a black screen
5.         blackScreenCover.SetActive(true);
6.  
7.         // Do resolution change
8.         Resolution aResolution = screenResolutionsList[screenResolutionsArrayIndex];
9.  
10.         bool doFullScreen = checkbox_Fullscreen.GetComponent<tk2dUIToggleControl>().IsOn;
11.         Screen.SetResolution(aResolution.width, aResolution.height, doFullScreen);
12.  
13.         // Turn off any way to hit a button (click/touch/keyboard/gamecontroller)
14.         // on the Options screen, temporarily
15.         GlobalStuffManager.Inst.inputsEnabled = false;
16.  
17.         // Wait here for half a sec for Screen.SetResolution to do its thing...
18.         // cuz some monitors can take a while to change rez
19.         yield return new WaitForSeconds(0.5f);
20.  
21.  
22.       //******** OK - from here on down, the game is at the new resolution *********
23.  
24.  
25.         // Turn inputs back on
26.         GlobalStuffManager.Inst.inputsEnabled = true;
27.  
28.         string tempLevelName = SceneManager.GetActiveScene().name;
29.  
30.         // Load an empty scene first to clear out old tk2d 1x2s4x textures.
31.         SceneManager.LoadScene("EmptyScene");
32.         GlobalStuffManager.Inst.SetTk2d_1X2X4X();
33.  
34.         // Restart Gameplay scene at the new resolution
35.         if (tempLevelName == "Gameplay")
36.         {
37.            SceneManager.LoadScene("Gameplay");
38.         }
39.         // Restart MainMenu scene at the new resolution
40.         else if (tempLevelName == "MainMenu")
41.         {
42.             SceneManager.LoadScene("MainMenu");
43.         }
44.         // Something went wrong...
45.         else
46.         {
47.         }
48. }

 

Windowed mode. Haven't seen it happen in full screen mode yet, I don't believe. The window size actually changes size so the resolution change does happen... I guess I can't say if the scene loads or the engine hangs because if I go to check the log file then going away from the game can make the black screen go away before I can see the log file. I guess I could play some music when the Gameplay scene starts (and stop it before rez change) and can tell that way.

 

Ah so I got it to do the black screen problem using a build that plays music when Gameplay starts - and when it did the black screen it did NOT play the music. Engine hang??