The same here. Trying to run Vulkan on NVIDIA GRID K520 and it’s marked as conformant:
$ nvidia-smi -q | head
==============NVSMI LOG==============
Timestamp : Mon Nov 7 19:06:18 2016
Driver Version : 370.28
Attached GPUs : 1
GPU 0000:00:03.0
Product Name : GRID K520
Product Brand : Grid
$ vulkaninfo
===========
VULKAN INFO
===========
Vulkan API Version: 1.0.32
INFO: [loader] Code 0 : Found manifest file /usr/local/etc/vulkan/explicit_layer.d/VkLayer_swapchain.json, version "1.0.0"
INFO: [loader] Code 0 : Found manifest file /usr/local/etc/vulkan/explicit_layer.d/VkLayer_parameter_validation.json, version "1.0.0"
INFO: [loader] Code 0 : Found manifest file /usr/local/etc/vulkan/explicit_layer.d/VkLayer_image.json, version "1.0.0"
INFO: [loader] Code 0 : Found manifest file /usr/local/etc/vulkan/explicit_layer.d/VkLayer_threading.json, version "1.0.0"
INFO: [loader] Code 0 : Found manifest file /usr/local/etc/vulkan/explicit_layer.d/VkLayer_object_tracker.json, version "1.0.0"
INFO: [loader] Code 0 : Found manifest file /usr/local/etc/vulkan/explicit_layer.d/VkLayer_unique_objects.json, version "1.0.0"
INFO: [loader] Code 0 : Found manifest file /usr/local/etc/vulkan/explicit_layer.d/VkLayer_core_validation.json, version "1.0.0"
INFO: [loader] Code 0 : Found manifest file /etc/vulkan/icd.d/nvidia_icd.json, version "1.0.0"
ERROR: [loader] Code 0 : Couldn't get vkCreateInstance via vk_icdGetInstanceProcAddr for ICD libGLX_nvidia.so.0
Cannot create Vulkan instance.
/home/ec2-user/Vulkan-LoaderAndValidationLayers/demos/vulkaninfo.c:681: failed with VK_ERROR_INCOMPATIBLE_DRIVER