Over the past couple of weeks I've been working on a Vulkan issue that could happen if the user had Vulkan tooling installed that was on a lower version of the API than their drivers claimed they could support. I figured this out when I tried to build the project requesting Vulkan SDK v1.3.296.0 while my drivers supported 1.4+. The error message I got was:
VUID-VkDeviceCreateInfo-pNext-pNext(ERROR / SPEC): msgNum: -1876993556 - Validation Error: [ VUID-VkDeviceCreateInfo-pNext-pNext ] | MessageID = 0x901f59ec | vkCreateDevice(): pCreateInfo->pNext chain includes a structure with unknown VkStructureType (55). This error is based on the Valid Usage documentation for version 296 of the Vulkan header. It is possible that you are using a struct from a private extension or an extension that was added to a later version of the Vulkan header, in which case the use of pCreateInfo->pNext is undefined and may not work correctly with validation enabled. The Vulkan spec states: Each pNext member of any structure (including this one) in the pNext chain must be either NULL or a pointer to a valid struct for extending VkDeviceCreateInfo
Which basically means "I don't know what VkStructureType (55) is because it's not defined on this API version."
I eventually figured out that we were chaining feature structs up to the highest available version the users machine could run instead of what we intend to target. I fixed this by choosing the minimum version between what we intend to target and what the driver supports and then using this as a check before chaining feature structs. The code snippet for this is below:
1. We get the device properties so we can see which API version our graphics drivers support
2. We check this against our requested API version and take the minimum
3. We use this as a gate for feature chaining so we don't chain anything over the requested API version
That's all of my updates for now!
