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Weird stripes on the entire Android screen

By pandisvezia on Fri, 09/27/2019 - 21:24

Hi,

I use the Vuforia Engine to create an augmented reality app. It detects some AR markers and show the pictures assigned to them. I build and run my app on an android tablet. When the app runs, I see the camera feed on the screen but the entire screen is made of horizontal black stripes. You can take a look at the uploaded image. I could not find a discussion on the net regarding this.

Did anyone experience a similar issue?

Best,

Ahmet

Hi,

All the rendering is done by Unity. In this case, I would advise to test our Core sample apps from the Unity Asset Store on your device.

Beside testing this device as advised above, please try your app also on a different mobile/tablet.

Thank you.

ivobrouwer

Mon, 12/30/2019 - 11:32

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I experienced a similar thing but could not find an answer yet. I seem to experience this problem only on a tablet and only when in landscape mode. Could be hardware related but may be useful to know. I attach the two (2) images from the tablet (but working fine on the PH-1).

Hi,

Any update on the issue? I'm experiencing the exact same problem, also on Huawei hardware. Both in landscape and portrait view.

 

Unity: 2019.2.14f1 

Vuforia: 8.5.9 and 8.6.7

Phone: Huawei P9 lite 2017 Android 8 (more than one phone)

krzysieknowicki

Wed, 02/05/2020 - 16:09

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Hello,

 

I have exactly the same issue as prnikiel.

Could somebody from Vuforia help with that ?

mcotora

Wed, 02/12/2020 - 09:18

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Hi @krzysieknowicki @prnikiel

Could you please provide try and run the Core Sample apps on the device? and let me know if this is reproducible.

If its not, please provide as requested a logcatdump and confirm which Graphics API is being used.

Thank you.

Hello, 

I checked and with Core Samples apps the issue didn't show up.

Logcat dump in attachment.

 

Regards,

Krzysztof

 

I have this black stripes problem too so any help is highly appreciated. The stripes appear on a Samsung S6 Edge but the app works fine on an LG G2.

MatejLetna

Sat, 02/08/2020 - 15:22

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Hello,

I have the same problem. Every time when I turn my phone (android, samsung galaxy A5) and switch to landscape mode, stripes will appear. Stripes always have color of background color of ARCamera. Any tips or  workarounds, please?

mcotora

Wed, 02/12/2020 - 09:15

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Hi @ MatejLetna,

Could you please provide a logcat dump when the issue has been reproduced?

Also could you please confirm if you have ARCore enabled and which Graphics API has been used OPEN GL ES 3 or 2?

Thank you.

Vuforia Engine Support

Gvidrinskis

Wed, 02/19/2020 - 18:43

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I solved this problem by landscaping to right side. Problem appeared only when I landscaped to left side.

JBarronUPMH

Thu, 03/19/2020 - 21:16

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I have the same problem, but I notice that the black lines are only on the video background not on the object, so it's probably the VideoBackgroundShader's fault. I'll post if I find a fix.

I also tried changing the camera's near and far clipping planes to no avail.

ionutciobi

Mon, 06/08/2020 - 07:27

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Same issue for me works perfect on most devices but on samsung j6 and maybe aother models it show that video rendering issue. i will try  aaron0512 sugestions and let you know if it worked for me also.

Riccardokhm

Thu, 11/19/2020 - 11:20

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Same problem for me with samsung galaxy tab a6, even if in the past I used it without any kind of issue like black stripes on screen.News?

I have the same problem. My stripes are just diagonal and constantly changing from stripes to dots and so on. I use a Samsung J5 and I have never had this problem on it before :(

johngorenfeld

Tue, 04/20/2021 - 10:56

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Having the same problem here on a Samsung S7. Wondering what worked the best as a fix? Disabling Vulkan? Are you out there, DuarteSz? :)

I fixed the really wierd rapidly changing stripes I had on my Samsung J5 by deleting the Vulkan.

Found this link and deleted Vulkan and checked OpenGLES3 was enabled/installed

Personally I "fixed" this issue by enabling "Auto Graphics API" checkbox.

This way Unity will select at runtime which is the best set of API for the target smartphone

https://docs.unity3d.com/Manual/GraphicsAPIs.html

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