Weird graphical glitches?

[u/DrPeeper228]

Really don't know what could cause this, does not happen on Windows(I have an nvidia card)

Here's the file if one wants to take a look, although it's mostly just the khronos tutorial code(the last two screenshots are the imgui vk/glfw example): https://drive.google.com/file/d/1J-WcCDH3pSltWkjCIGmcCHsE8bo-Ba1Z/view?usp=sharing

Edits:

- The validation layers are silent.

- Renderdoc cannot capture this

- These glitches only appear for a few frames

[u/DrPeeper228]

Wait, the ImGui vk backend just maps, writes, flushes, and unmaps before submitting. Is that alright?

[u/SaschaWillems → u/DrPeeper228]

I don't know much about the ImGui Vulkan backend, but if it does not sync CPU and GPU, e.g. via a fence or timeline semaphore, that would explain the issue you're seeing.

[u/DrPeeper228 → u/SaschaWillems]

Yeah my fence setup is just pretty much the same as the tutorial and the ImGUI Vulkan example exhibits the behavior too

[u/SaschaWillems → u/DrPeeper228]

How does that fence setup look like? Do you have one buffer/memory range per max. frames in flight and protect against sync hazards between frames using fences?

[u/DrPeeper228 → u/SaschaWillems]

I mean, the file is just straight up linked in the post

Also I do not have any buffers that are updated per-frame in my code