# ARCore. Mali GPU black screen issue with HDR On

**URL:** <https://forums.unrealengine.com/t/arcore-mali-gpu-black-screen-issue-with-hdr-on/143108>\
**Category:** XR Development\
**Tags:** unreal-engine\
**Created:** [May 8, 2020, 5:20pm UTC](https://forums.unrealengine.com/t/arcore-mali-gpu-black-screen-issue-with-hdr-on/143108 "2020-05-08T17:20:29Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![anonymous\_user\_27868e42](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_27868e42](https://forums.unrealengine.com/u/anonymous_user_27868e42)\
**Post date:** [May 8, 2020, 5:20pm UTC](https://forums.unrealengine.com/t/arcore-mali-gpu-black-screen-issue-with-hdr-on/143108/1 "2020-05-08T17:20:29Z")

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Have trouble with HDR on at Mali GPU on mobile (Samsung).Have black screen after starting AR session. Template projects works fine, can’t catch change in project that cause such issue. If restart template project and migrate to it map from last one - will work, but if you make any changes in map or bueprints - return black screen again. Very annoing return all settings time after time to make some changes and get it work. Does anybody found solution for this?

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**Author:** ![NobbigvonL](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@NobbigvonL](https://forums.unrealengine.com/u/NobbigvonL)\
**Post date:** [May 11, 2020, 11:18pm UTC](https://forums.unrealengine.com/t/arcore-mali-gpu-black-screen-issue-with-hdr-on/143108/2 "2020-05-11T23:18:54Z")

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So many ARCore bugs…

> **[The Unreal Engine Issues and Bug Tracker](https://issues.unrealengine.com/issue/UE-87102)**
>
> Welcome to the Unreal Engine Issue and Bug Tracker. You can check the status of an issue and search for existing bugs. See latest bug fixes too.

> **[The Unreal Engine Issues and Bug Tracker](https://issues.unrealengine.com/issue/UE-81660)**
>
> Welcome to the Unreal Engine Issue and Bug Tracker. You can check the status of an issue and search for existing bugs. See latest bug fixes too.

> **[The Unreal Engine Issues and Bug Tracker](https://issues.unrealengine.com/issue/search?q=ar&resolution=open&component=&sort=)**
>
> Welcome to the Unreal Engine Issue and Bug Tracker. You can check the status of an issue and search for existing bugs. See latest bug fixes too.

Another bug is when renaming maps in the content browser, the default startup map, game mode and game instance are lost. So the game starts with no map.  
Check maps&modes in the project settings and verify they are still set correctly before packaging.

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**Author:** ![CosmicLobster](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/cosmiclobster/32/1211357_2.png) [@CosmicLobster](https://forums.unrealengine.com/u/CosmicLobster)\
**Post date:** [May 31, 2021, 4:55pm UTC](https://forums.unrealengine.com/t/arcore-mali-gpu-black-screen-issue-with-hdr-on/143108/4 "2021-05-31T16:55:33Z")

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Thanks,  
do you happen to know if these two issues still exist in 4.26.2?

- AR with only 30fps [4.26 AR low FPS](https://forums.unrealengine.com/t/4-26-ar-low-fps/154588)
- AR bad camera quality [AR bad camera quality](https://forums.unrealengine.com/t/ar-bad-camera-quality/137661)