NVIDIA has released a new Vulkan beta driver for Linux

Release Updates
August 31st, 2018 - Windows 399.17, Linux 396.54.02

New Extensions:
VK_EXT_swapchain_colorspace (Windows only)
VK_EXT_hdr_metadata (Windows only)
Bug fixes:
VK_EXT_vertex_attribute_divisor has been updated to version 3
Entry point queries for VK_EXT_conditional_rendering have been fixed
Missing primitives with some DXVK content has been fixed

  NVIDIA Linux Vulkan Driver 396.54.02 Beta released