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vk_probe/vk_probe2 (ctypes loader probes: enumerate + create device/queue), vk_frame (headless Vulkan compute renderer: loads the NVIDIA ICD, paints a plasma into an RGBA8 storage image, reads it back to PPM and publishes frames into the kvmfr ivshmem BAR), vk_plasma.comp -> SPIR-V; nvkmstrace.c (LD_PRELOAD NVKMS ioctl logger that decoded the vkCreateDevice failure to ALLOC_DEVICE cmd=0). Measured: the NVIDIA device enumerates and its Vulkan ICD loads (2 ICDs: NVIDIA + llvmpipe); vkCreateDevice fails VK_ERROR_INITIALIZATION_FAILED because nvKmsAllocDevice returns non-success after the display shim
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