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Godot cannot start as it fails to create a Vulkan window on a multi-GPU setup #54962

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KaruroChori opened this issue Nov 14, 2021 · 3 comments · Fixed by #55020
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Godot cannot start as it fails to create a Vulkan window on a multi-GPU setup #54962

KaruroChori opened this issue Nov 14, 2021 · 3 comments · Fixed by #55020
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bug topic:rendering
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4.0

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@KaruroChori
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Godot version

v4.0.dev.calinou.ed300d7be

System information

linux amd64, RTX 3070 and RTX 3060. Drivers updated to 460.91.03

Issue description

The application cannot run. Vulkan is working fine with other applications as well as all the other APIs supported by these cards.
image

Steps to reproduce

Running the executable.

Minimal reproduction project

No project required.
@KaruroChori KaruroChori mentioned this issue Nov 14, 2021
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@Chaosus Chaosus added this to the 4.0 milestone Nov 14, 2021
@RedwanFox RedwanFox mentioned this issue Nov 14, 2021
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@Calinou
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Calinou commented Nov 14, 2021 •
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RTX 3070 and RTX 3060

Multi-GPU setups are not supported on Vulkan yet as per #49506 (comment).

@Calinou Calinou changed the title Godot cannot start as it fails to create a vulkan window Godot cannot start as it fails to create a Vulkan window on a multi-GPU setup Nov 14, 2021
@bruvzg
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bruvzg commented Nov 14, 2021

We should add a check to reject devices without present capability, something like this:

https://github.com/coelckers/gzdoom/blob/01b825b18198126b1ea2f88b50a17a0c4477ac8b/src/common/rendering/vulkan/system/vk_device.cpp#L137-L147

@bruvzg bruvzg mentioned this issue Nov 16, 2021
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@bruvzg
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bruvzg commented Nov 16, 2021

Here's the aforementioned check implemented for Godot - #55020, but I haven't tested it on actual multi-GPU setup.

@Calinou Calinou mentioned this issue Dec 22, 2021
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bug topic:rendering
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[Vulkan] Check each device capabilities before selecting it. bruvzg/godot
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@Calinou @Chaosus @bruvzg @KaruroChori