А как нонче запускать amdvlk?

vk_amdvlk mangohud vkcubeCannot find a compatible Vulkan installable client driver (ICD).

Please look at the Getting Started guide for additional information. 

ls /usr/share/vulkan/icd.d
amd_icd32.json  amd_icd64.json  radeon_icd.i686.json  radeon_icd.x86_64.json 

cat /usr/share/vulkan/icd.d/amd_icd64.json
{
  "file_format_version": "1.0.0",
  "ICD": {
    "library_path": "/usr/lib/amdvlk64.so",
    "api_version": "1.3.269"
  },
  "layer": {
    "name": "VK_LAYER_AMD_switchable_graphics_64",
    "type": "GLOBAL",
    "library_path": "/usr/lib/amdvlk64.so",
    "api_version": "1.3.269",
    "implementation_version": "1",
    "description": "AMD switchable graphics layer",
    "functions": {
      "vkGetInstanceProcAddr": "vk_icdGetInstanceProcAddrSG",
      "vkGetDeviceProcAddr": "vk_icdGetDeviceProcAddrSG"
    },
    "disable_environment": {
      "DISABLE_LAYER_AMD_SWITCHABLE_GRAPHICS_1": "1"
    }
  }
}