The main question is in the title.

I got a strang bug with an Intel UHD 620 under Linux, vulkan API report there is no depthBounds feature.

It sound very strange, because this feature is required to perform depth testing.

>Solution :

Yes, depthBounds is an optional feature of Vulkan. Indeed, everything defined as a "feature" is optional. That’s what "features" are: parts of the API that are optional, that if you want to use you must first check for it and request it at device-creation time.

this feature is required to perform depth testing

No, it’s required to perform the depth bounds test. That’s different from a depth test.

The depth test tests an incoming fragment’s depth against a single value taken from the depth buffer. The depth bounds test tests an incoming fragment’s depth against two fixed depth values specified by the pipeline/dynamic state.