Note, this is still a problem on iOS with Unity 2019.1.12f1 and Vuforia 8.3.8 

A workaround is to disable auto graphics API, and have OpenGL ES3 before Metal 

However this then limits other graphical and postprocessing features that are available only in Metal. 

This is unacceptable. 

Is there a known version of Vuforia that works with Metal + Unity? 

Hello @Vidalicious,

We had a similar issue with ProGuard where some Vuforia symbols were wrongly stripped - this fix is coming in Vuforia Engine 8.3 (soon).

I'm wondering if a similar workaround exists for this tool? https://developer.vuforia.com/forum/issues-and-bugs/android-production-black-camera#comment-68478. Long shot, I know, but worth a look.

Otherwise, send a debug trace of Vuforia messages and I can take a look. For Android:

$ adb logcat AR:D Unity:D *:S

Thanks,

Vuforia Engine Support

Hello,

I was able to reproduce the black screen. When I install ProBuilder I'm getting a black screen instead of the camera feed when building on my iOS, and when I uninstall Probuilder it works.

I used the Vuforia Core samples to be sure of it.

My settings are:

ProBuilder 4.05 (and tried with older too)

Unity 2019.1.4.f1 (I have compelling errors with the last unity versions)

OpenGLES3 (metal editor support and auto graphics API uncheck)

Vuforia 8.1.11

Xcode 10.2.1

Mojave 10.14.5

iPad and iPhone 12.3.1

Hello @medabit,

Thanks for your quick answer! I recreate the issue by duplicating the unity project file, the issue was in that manipulation. I shouldn't have duplicate the unity project, there might be some unbreakable link inside. However, I could notice another project got black screen and I don't know why, but I'll let you know if I find a clue.

So far, black screen were due to:

- Not having uncheck the Metal Editor Support/Auto Graphics API

- Having duplicate the Unity project file

- (Versions confrontation issue)

Hello @Vidalicious,

I attempted to recreate the issue using the Vuforia Engine Core samples, using all the same versions as you've listed, and did not observe a black screen issue. If you can recreate this issue using the Core Samples, please let us know and provide details about your Unity build settings.

Thanks,

Vuforia Engine Support

Hello,

Could it be an issue due to copy/paste our Unity project folder and somehow links got confused? This time it happened just after I did that.

My settings are the following (but these settings works on another AR project so...!) :

Unity 2019.1.4.f1 (I have compelling errors with the last unity versions)

OpenGLES3 (metal editor support and auto graphics API uncheck)

Vuforia 8.1.11

Xcode 10.2.1

Mojave 10.14.5

iPad and iPhone 12.3.1

I had black screen several times in the past, but could resolve them after making all last updates (except unity) and turning Auto Graphics API and Metal Editor Support, but not this time!

Sometimes after building and having the black screen result, I get error messages on Xcode as following (but sometimes not, might be link to that though).

Thank you in advance,

Vidal

Hello all,

Is there any news? we need to launch an app that has missed its deadline by far because of this.

Any update on this problem? I have run into this situation as well and need a resolution ASAP. I have been able to get around the black screen issue while testing by copying the device support files from Xcode 10.2.1 into Xcode 9.2 However, when it comes to publishing the app for upload to the app store, the Base SDK of Xcode 9.2 will not go above 11.2(even with the newer iOS device support files installed) and the app store requires a minimum of 12.1 as of March 2019.

Device: iPad Pro 10.5

iOS: 12.2

Xcode: 10.2.1

Unity: 20173.1f1

Vuforia: 7.0.47

MacOS: 10.14.4

Please note that we did try updating our Unity and Vuforia but something changed in newer versions of Vuforia that broke our app and after several hours of troubleshooting we were unable to fix it so we had to stick with what was working.

Please help, thanks in advance.

Glen

unity:2018.3.0.f2

xcode:9.4.1(9f2000)

iOS:12.1.4(16d57）

I'm using metal in Unity and I almost tried every things to solve that the Vuforiia is always black screen ,turns out the OpencvForUnity is the key.

It's plugin and I setted opencv2.framework in Xcode with embedded binaries.Remove it, all is good.

Just for someone who encountering this same isuue.

Hello @anwerskk,

We are still unable to replicate the issue despite numerous attempts. We really need someone to submit a minimal repro project, ideally using our sample apps, that demonstrates the problem.

This would also need to include specifics about:

• Device model and OS version
• Xcode version
• Unity Editor version
• Vuforia Engine SDK version
• Mac OS version
• Any additional steps, settings and or configurations

We received all of this information previous, and I setup the environment to match, but I could not replicate.

Thanks,

Vuforia Engine Support

Any update on this? Did QA come up with any new findings?

- Anwer

Hello @brianyan918,

That would be helpful as we looked further and found that what we reproduced is not a crash. Rather, we observed a very long delay until app start when building and launching using Xcode 10.2.

Thanks,

Vuforia Engine Support

@medabit I'm happy to provide a minimal repo if you would like to pass it to your QA team for replication. Let me know if that is preferred.

Hi - 

I'm running into the same blank screen error. Vuforia 8.0, Unity 2018.3.5f1, Xcode 10.1, and iOS 12.1.4.

Initializing Vuforia...

2019-04-05 15:55:04.843852-0400 pe[4197:1025444] User pre-granted access to the camera

2019-04-05 15:55:04.843958-0400 pe[4197:1025444] INFO/AR(4197) 2019-04-06 15:55:04: Vuforia selected rendering API OpenGL ES 2.x

2019-04-05 15:55:04.844001-0400 pe[4197:1025444] INFO/AR(4197) 2019-04-06 15:55:04: Vuforia SDK version 8.0.10

2019-04-05 15:55:04.930193-0400 pe[4197:1025444] INFO/AR(4197) 2019-04-06 15:55:04: Matched precache profile for Apple, iPhone10,3, iOS 12, 800.1

2019-04-05 15:55:05.663703-0400 pe[4197:1025444] INFO/AR(4197) 2019-04-06 15:55:05: Vuforia Fusion: Detected and enabled use of ARKit

2019-04-05 15:55:05.669337-0400 pe[4197:1025444] Rendering mode set to: OpenGL ES 2.0

2019-04-05 15:55:05.743495-0400 pe[4197:1025444] Rendering mode set to: OpenGL ES 2.0

2019-04-05 15:55:05.744555-0400 pe[4197:1025444] DEBUG/AR(4197) UIView has CAEAGLLayer layer class

2019-04-05 15:55:05.744656-0400 pe[4197:1025444] DEBUG/AR(4197) UIView does not respond to selector renderFrameVuforia

2019-04-05 15:55:05.744782-0400 pe[4197:1025444] DEBUG/AR(4197) UIView has CAEAGLLayer layer class

2019-04-05 15:55:05.744842-0400 pe[4197:1025444] DEBUG/AR(4197) UIView does not respond to selector renderFrameVuforia

2019-04-05 15:55:05.744947-0400 pe[4197:1025444] DEBUG/AR(4197) Could not find a UIView with CAEAGLLayer or CAMetalLayer layer class that responds to selector renderFrameVuforia

Hope this info helps replicating the issue. Will be tuning in for a resolution. Seems that Android is OK, so would like to resolve iOS quickly.

Hello,

Thanks for the additonal feedback. I was finally able to replicate a black screen event when the build was launched by Xcode on device running iOS 12.1. However, once the app was killed and restarted the black screen event cannot be reproduced.

I've handed this off to the QA team for additional investigation, and will update this thread with relevant updates.

Thanks,

Vuforia Engine Support

Some more information about this issue;

macOS Mojave (10.14.3)

Unity Editor 2018.3.8f1

Vuforia Engine SDK 8.1.7

iPhone X running iOS 12.1.4

Xcode 10.2 (10E125)

Same issue with Vuforia Core Samples. When you run the app there is a black screen for some time then the app will start working but during the back screen there are some serious errors  on the XCode console as follows;

2019-04-04 19:50:26.231649-0700 CoreSamplesUnity[20607:5760162] Rendering mode set to: Metal

=================================================================

Main Thread Checker: UI API called on a background thread: -[UIApplication windows]

PID: 20607, TID: 5760364, Thread name: UnityGfxDeviceWorker, Queue name: com.apple.root.default-qos.overcommit, QoS: 0

Backtrace:

4   Vuforia                             0x0000000104d3dbe0 _ZN7Vuforia4initEv + 1732588

5   Vuforia                             0x0000000104d3dfb4 _ZN7Vuforia4initEv + 1733568

6   Vuforia                             0x0000000104c55d18 _ZN7Vuforia4initEv + 782628

7   Vuforia                             0x0000000104c3a874 _ZN7Vuforia4initEv + 670848

8   Vuforia                             0x0000000104b766dc _ZN7Vuforia16onSurfaceCreatedEv + 56

9   CoreSamplesUnity                    0x00000001013a5b24 onSurfaceCreated + 32

10  CoreSamplesUnity                    0x0000000100dece94 _ZN9GfxDevice26InsertCustomMarkerCallbackEPFviEi + 48

11  CoreSamplesUnity                    0x0000000100bbc3d8 _ZN15GfxDeviceWorker10RunCommandER20ThreadedStreamBuffer + 12032

12  CoreSamplesUnity                    0x0000000100f7c428 GfxDeviceWorkerAutoreleasePoolProxy + 68

13  CoreSamplesUnity                    0x0000000100bc0b30 _ZN15GfxDeviceWorker6RunExtER20ThreadedStreamBuffer + 112

14  CoreSamplesUnity                    0x0000000100bb92c0 _ZN15GfxDeviceWorker18RunGfxDeviceWorkerEPv + 12

15  CoreSamplesUnity                    0x0000000100db22e0 _ZN6Thread16RunThreadWrapperEPv + 516

16  libsystem_pthread.dylib             0x00000001bbc7425c <redacted> + 128

17  libsystem_pthread.dylib             0x00000001bbc741bc _pthread_start + 48

18  libsystem_pthread.dylib             0x00000001bbc77cf4 thread_start + 4

This happens only if you use Metal. If you disable Auto-Graphics API and remove metal from the list everything works just fine.

- Anwer

I just updated Vuforia from 8.0.10 to 8.1.7 and now my projects all have a black screen. I made no other changes other than the update. If you do not have a fix, how do I roll back to 8.0.10?!

Hello,

Based upon reports of black screen issues on iOS builds, I retested the Vuforia 8.1.8 Core Samples with the following configuration:

• macOS Mojave (10.14.4)
• Unity Editor 2018.3.6f1
• Vuforia Engine SDK 8.1.7
• iPhone XS running iOS 12.2
• Xcode 10.2

Building the Core samples application, as-is with all scenes included, I did not observe a black screen when running any of the features, and performance looked excellent.

My only suggestion is to review your Unity build settings compared to those in the Vuforia Core samples to see if there are any discrepancies.

Thanks,

Vuforia Engine Support

PopFox wrote:

HI

I'm having same problem as black screen problem while opening the Application on ios 12.1.4 , Unity 2018.3 0f2, vuforia version 8.1.7. Kindly give solution as soon as possible.

Still having the same problem. is there a solution to this problem yet?

Unity 2018.3.6f1

Vuforia 8.1.7

XCode 10.2

iPhone 8 Plus - IOS 12.1.4

iPad - IOS 12.1.4

No it isn't solved , same problem still exist

HI

I'm having same problem as black screen problem while opening the Application on ios 12.1.4 , Unity 2018.3 0f2, vuforia version 8.1.7. Kindly give solution as soon as possible.

It looks like the new version of Vuforia (8.1.7) is working fine in iOS, without the black screen problem...

Does anyone from Vuforia Team read this forum?

Where is the user support?

Hi @medabit,

Until iOS 12.1.2 there is no problem with Vuforia. The black screen problem starts at iOS 12.1.3 (and in IOS 12.1.4 too);

Here is what you can use to detect the problem:

A minimal repo project: Any project using Vuforia (can be a default core sample project)

Recommended device model: I tested on iPhone 8 Plus, but you can try any device with iOS 12.1.3 or iOS 12.1.4

Unity Editor version: 2018.3.0f2 or above

Vuforia SDK version: 8.0.10

Xcode version: 10.1

We need your support!

I use XCode 10.2, Unity 2018.2.14, Vuforia 8.

There was a black screen in ios12.1.4

How should I solve this problem?

Hello @magglemitch,

I just tried to reproduce the error using:

• Unity Editor 2018.3.1f1
• Vuforia Engine SDK 8.0.10
• Vuforia Core Samples 8.0.11
• Xcode 10.1
• iPhone 6S, iOS 12.1.2

By default, the Core samples project has Metal enabled. I was able to build and run it with no issue (e.g. no black screen).

If you still believe that this is a Vuforia issue, please provide:

1. A minimal repo project
   • If it can be recreated with the Core samples, then please provide explicit steps
2. Recommended device model
3. Unity Editor version
4. Vuforia SDK version
5. Xcode version

Thanks,

Vuforia Engine Support

Happening with me too - seems to be a problem with the Metal graphics API? Works on OpenGLES3 but I need Metal for some plugins.

Is there any way around this? Would be absurd for Vuforia to still have issues with Metal at this stage.

We are facing the same problem here.

It seems that iOS 12.1.3 (at least when running on some devices) is not compatible with Vuforia (or with Vuforia + Unity), presenting flaws like non-loading scenes with Vuforia and/or “black screen”.

Could someone from Vuforia confirm this information?

Are there any predictions to solve this problem?

Thank you!

@mkshastri Thanks, but it's not the same problem for me.

I use XCode 10.1, Unity 2018.3, Vuforia 8.

The problem is appeared with an application upgraded from Unity 5.5.0, but when I create a new application from scratch, it perfectly works ...

Something seems to be wrong with the upgraded project ONLY on some devices... ! And perfectly works with others...

It's very strange.

pant76 wrote:

Black screen in ipad pro xcode 9.5 vuforia 7.....some additional elements:

I deployed the application with xcode 9.5 and cable to ipad pro.....all was ok.....after some days the app started reporting the problem. i used test flight to deploy the app, i reinstalled from test flight several times.....nothing worked. Now ipad has ios 11.3.1 (when app worked fine ipad was ios 11.3 now 11.3.1)

Need solution soon please 

I'm facing a similar problem (Unity 2018.3) on some devices too.

It's very strange : 

-It works on an iPad Pro with iOS 12.1.3, and on an iPhone 6S with iOS 12.1.3

-But I have black screen with an iPad 2 wih iOS 12.1.3 and on an iPhone 5S with iOS 12.1.2

Same problem here, i need support

I have the same problem with the black screen, in Iphone 5s with ios 12.1.2

i try to build in the xcode 9.2 with some changes but nothing.

today i try build with the last version of Xcode, last version of vuforia and last version of unity and nothing again, i really need help to fix it. 

I have the same problem with the black screen. 

Device: iPhone 7, iOS 12.0

Mac OS High Sierra

Vuforia Version: 8.0.10

Unity version: 2018.2

I tried with XCode 10.1, 9.2( as suggested in the forum with ios version 11.3)

But no luck. :(

Did anyone get a chance to solve this problem?

PLEASE HELP!!!!!!

Hi, I'm suffering from this same apparent problem, getting a black screen when building a Unity/Vuforia created project to iOS using XCode.

This game works fine in game view within Unity, although the scene order matters, e.g. if the Vuforia scene is not the first scene, the screen is black even within the Unity game engine.

Specifically, I get a black screen with these system specs:

XCode I have tried 10, but as suggested in this forum have tried lower versions, 9.3, 9.2, etc.

Unity: 2018.3.0f2 (I also tried older versions of Unity, but one post suggested updating, so I did).

Device: iPhone 7, iOS 12.0

I have tried switching graphics to OpenGLES2 and other options rather than default, this hasn't worked.

So I turn to this Forum - you're my only hope!

Has anyone solved this??

Thanks!

Hello, I also encountered the same problem. The solution I solved was to reduce the xcode version to xcode9.2, but the newer ios did not have a black screen, which I hope is helpful to you. The device version of my side is as follows: unity2018.1 xcode9.2 vuforia7.2.2.

Hello,

Just wanted to add I have the same issue with last Vuforia, Unity 2017 and iOS 12.

All works with older version of iOS but  black screen on Iphone 7 and Iphone 8+ with iOS 12.

Hope somdebody find something !

Hello,

Thanks for the information. I will look to replicate.

-Vuforia Engine Support

Hello,

I did the last Vuforia update (7.5.26) and tried on an other device.

Also an iPhone 7, initially on iOS 11.4.1(15G77). The "Required sensor failed." error log is still there, but the black camera bug is gone!! (on around 100 runs).

Then I upgraded the phone to iOS 12.0.1(16A404), and the black camera bug is back :(

ps1: I did all the tests with the last and unchanged official "Vuforia AR+VR Sample" asset.

ps2: the "Error pushing camera intrinsics to VIO" Error log is only on iOS 12, but I don't think it is related to my issue.

Hello,

Have you tried on a different device? From the error messages it seems that you may have a flaky IMU.

Thanks,

Vuforia Engine Support

Hello,

I have the same issue here. Sometimes it initializes correctly, other times the screen remains black and the target is not detectable.

• Unity 2018.2.13f1
• Vuforia 7.2.23
• Xcode 10.1
• iOS 12.0.1(16A404)
• iPhone 7

The behavior is the same with Metal or OpenGLES2 Graphic API. Im doing those tests with the official "Vuforia AR+VR Sample" asset.

I need help, I can not deploy my product on iOS with this bug. Thank you!

Typical Error Logs:

Cannot create AR RenderingPrimitives before Camera is initialized

Cannot setMode to AR before Camera is initialized

VideoBackgroundConfig with screen size of zero received, skipping config step

VideoBackgroundConfig with screen size of zero received, skipping config step

Session (0x108eee4f0): did fail with error: Error Domain=com.apple.arkit.error Code=102 "Required sensor failed." UserInfo={NSLocalizedFailureReason=A sensor failed to deliver the required input., NSUnderlyingError=0x28206ebe0 {Error Domain=AVFoundationErrorDomain Code=-11800 "The operation could not be completed" UserInfo={NSLocalizedFailureReason=An unknown error occurred (-12780), NSLocalizedDescription=The operation could not be completed, NSUnderlyingError=0x282070900 {Error Domain=NSOSStatusErrorDomain Code=-12780 "(null)"}}}, NSLocalizedRecoverySuggestion=Make sure that the application has the required privacy settings., NSLocalizedDescription=Required sensor failed.}

Error pushing camera intrinsics to VIO: <matrix=

Error pushing camera intrinsics to VIO: <matrix=

...

Error pushing camera intrinsics to VIO: <matrix=

Libor wrote:

Hi,

this is still not work for me (I have blank white screen). My configuration:

• Xcode 10
• iPhone 8 (iOS 12)
• Unity 2018.2.9
• Vuforia 7.2.23

Is it normally working with Xcode 10 and iOS 12 and am I only one who has this problem? Or Vuforia must be updated?

Example of my console logs (I think related to this problem):

User pre-granted access to the camera

[6669:1320892] INFO/AR(6669) 2018-09-27 10:08:15: Vuforia selected rendering API OpenGL ES 2.x

[6669:1320892] INFO/AR(6669) 2018-09-27 10:08:15: Vuforia SDK version 7.2.23

[6669:1320892] INFO/AR(6669) 2018-09-27 10:08:15: Vuforia Fusion: Detected and enabled use of ARKit

[6669:1320892] Rendering mode set to: OpenGL ES 2.0

[6669:1320892] Rendering mode set to: OpenGL ES 2.0

[6669:1320892] DEBUG/AR(6669) Could not find a UIView with CAEAGLLayer or CAMetalLayer layer class that responds to selector renderFrameVuforia

[6669:1320892] DEBUG/AR(6669) UIView has CAEAGLLayer layer class

[6669:1320892] DEBUG/AR(6669) UIView does not respond to selector renderFrameVuforia

[6669:1320892] DEBUG/AR(6669) UIView has CAEAGLLayer layer class

[6669:1320892] DEBUG/AR(6669) UIView does not respond to selector renderFrameVuforia

[6669:1320892] DEBUG/AR(6669) Could not find a UIView with CAEAGLLayer or CAMetalLayer layer class that responds to selector renderFrameVuforia

Vuforia initialization successful ...

[6669:1320892] ERROR/AR(6669) 2018-09-27 10:08:16: Cannot setMode to AR before Camera is initialized

Dataset ARBoxes could not be loaded and cannot be activated.

...

cameraDeviceStartCamera

[6669:1320892] INFO/AR(6669) 2018-09-27 10:08:16: Starting camera with profile for iPhone10,4, 720.1

[6669:1320892] ERROR/AR(6669) 2018-09-27 10:08:16: VideoBackgroundConfig with screen size of zero received, skipping config step

Thanks for info.

Were you seeing this issue with iOS 11 or are you just now seeing it after upgrading to iOS 12?

Thanks,

Vuforia Engine Support

Hi,

this is still not work for me (I have blank white screen). My configuration:

• Xcode 10
• iPhone 8 (iOS 12)
• Unity 2018.2.9
• Vuforia 7.2.23

Is it normally working with Xcode 10 and iOS 12 and am I only one who has this problem? Or Vuforia must be updated?

Example of my console logs (I think related to this problem):

User pre-granted access to the camera

[6669:1320892] INFO/AR(6669) 2018-09-27 10:08:15: Vuforia selected rendering API OpenGL ES 2.x

[6669:1320892] INFO/AR(6669) 2018-09-27 10:08:15: Vuforia SDK version 7.2.23

[6669:1320892] INFO/AR(6669) 2018-09-27 10:08:15: Vuforia Fusion: Detected and enabled use of ARKit

[6669:1320892] Rendering mode set to: OpenGL ES 2.0

[6669:1320892] Rendering mode set to: OpenGL ES 2.0

[6669:1320892] DEBUG/AR(6669) Could not find a UIView with CAEAGLLayer or CAMetalLayer layer class that responds to selector renderFrameVuforia

[6669:1320892] DEBUG/AR(6669) UIView has CAEAGLLayer layer class

[6669:1320892] DEBUG/AR(6669) UIView does not respond to selector renderFrameVuforia

[6669:1320892] DEBUG/AR(6669) UIView has CAEAGLLayer layer class

[6669:1320892] DEBUG/AR(6669) UIView does not respond to selector renderFrameVuforia

[6669:1320892] DEBUG/AR(6669) Could not find a UIView with CAEAGLLayer or CAMetalLayer layer class that responds to selector renderFrameVuforia

Vuforia initialization successful ...

[6669:1320892] ERROR/AR(6669) 2018-09-27 10:08:16: Cannot setMode to AR before Camera is initialized

Dataset ARBoxes could not be loaded and cannot be activated.

...

cameraDeviceStartCamera

[6669:1320892] INFO/AR(6669) 2018-09-27 10:08:16: Starting camera with profile for iPhone10,4, 720.1

[6669:1320892] ERROR/AR(6669) 2018-09-27 10:08:16: VideoBackgroundConfig with screen size of zero received, skipping config step

Thanks for info.

This worked for me. Thank you!

Hi,

Previous build with Vuforia 7.1.xx with Xcode 9.3 on OSX 10.13 cause camera not working (black screen). Issue resolved after updated to the latest Vuforia 7.2.23.

Anyway Unity version 2018.1.0f2.

Thanks!

Hello,

Vuforia 7.1.34 (and later) has the fix for this issue. This version will be available within Unity 2018.1.0f1 and later.

Thanks,

Vuforia Engine Support

Im having the same error every time. Getting annoyed.

Hello @navneetaquytech,

navneetaquytech wrote:

I am working with Vuforia Cloud recognition using Unity 2017.3.0p4 Vuforia 7.0.47. I am having issues of Black screen on my iOS 11.3 build with Xcode 9.4.

This is a known issue covered extensively on this thread, and others: https://forum.unity.com/threads/known-issue-when-developing-with-vuforia-7-xcode-9-3-and-ios-11-3-beta-arkit-1-5.516117/#post-3450395

navneetaquytech wrote:

Also tried with Unity 2018.1.4f1 with Vuforia 7.1.43 but cloud recognition not working any more.

Seeing other, similar reports but we have yet to replicate. We'll continue to investigate.

Thanks,

Vuforia Engine Support

Hi,

I am working with Vuforia Cloud recognition using Unity 2017.3.0p4 Vuforia 7.0.47. I am having issues of Black screen on my iOS 11.3 build with Xcode 9.4. Also tried with Unity 2018.1.4f1 with Vuforia 7.1.43 but cloud recognition not working any more.

Can you provide specific numbers to ensure we are referring to the same builds?

Thanks,

Vuforia Engine Support