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Fixed

Fixed in 2022.3.69f1, 6000.0.62f1, 6000.2.11f1, 6000.3.0b10, 6000.4.0a5

Votes

4

Found in

2022.3.67f1

6000.0.56f1

6000.1.8f1

6000.2.0a4

6000.3.0a2

6000.4.0a2

6000.5.0a1

Issue ID

UUM-123207

Regression

Yes

[Metal] Game freezes after command buffer Timeout error - Disable CAMetalDisplayLink by default

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Description
CAMetalDisplayLink is causing kIOGPUCommandBufferCallbackErrorTimeout errors. Disabling the CAMetalDisplayLink and using CADisplayLink instead does not cause games to freeze.

IMPORTANT: This issue tracks which fixed versions CAMetalDisplayLink is disabled by default. Check https://issuetracker.unity3d.com/product/unity/issues/guid/UUM-125778 for the actual fix.

IMPORTANT: For previous affected Unity versions you can disable the CAMetalDisplayLink. See https://discussions.unity.com/t/freeze-on-ios-with-metal-display-link/1693201

Reproduction steps
1. Open a project and build for iOS.
2. Play the game, possibly for more than 30 minutes until the image freezes. A Timeout error is shown in XCode.

Expected behaviour
The game does not freeze.

Actual behavior
The game freezes.

  1. Resolution Note (fix version 2022.3.69f1):

    The CAMetalDisplayLink is disabled until we find a fix for the underlying issue.

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Comments (1)

  1. dnecesal

    Nov 19, 2025 09:28

    Adding to this:

    When using OnDemandRendering the app will hard freeze on several iOS versions when the CAMetalDisplayLink is enabled.

    I have had to disable it using post process build to ensure OnDemandRendering can be used in our app.

    The main thread freeze happens right after OnDemandRendering.renderFrameInterval is modified.

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