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Fixed in Unity 2018.2



Found in


Issue ID




[iOS][Metal] Crash/freeze when changing antialiasing settings during runtime




Priority: 7Not yet prioritized for a release


Severity: 1Crash, freeze, data loss, work stops

To reproduce:
1. Open attached project "case_1082360-MetalAABugDemo"
2. Open "main.unity" scene
3. Make sure that Graphics API is set to Metal in Player Settings
4. Build for iOS
5. Deploy the Xcode project to iOS device
6. Press on "Increase AA" button then on "Decrease AA" button multiple times

Expected result: Antialiasing is changed without any issues
Actual result: increasing and decreasing antialiasing multiple times freezes the app

Reproduced on:
2017.4.11f1 2018.1.9f2

Not reproduced on:
2018.2.0a1 2018.2.9f1 2018.3.0b2 2019.1.0a1

Device reproduced on:
iPhone 7 Plus iOS 11.1.1

Only reproduces on Metal
Did not reproduce on:
MacOS 10.13.5 Radeon Pro 570 4096 MB 3,4 GHz Intel Core i5
OpenGLES 2
OpenGLES 3

Comments (1)

  1. 61e947278698b6e67b738af46dafda1d?d=mm


    Oct 11, 2018 15:18

    Thanks for the report, fixed our freeze problem on 2017.4.11f as well.

    Hoping Unity would fix this issue on upcoming LTS versions.

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