Vulkan on Intel is not working anymore.

After updating to 12.1~git20160921 (i have forgotten the last version, sorry)
'vulkaninfo' is printing following error messages:
---------------------
===========
VULKAN INFO
===========

Vulkan API Version: 1.0.13

INFO: [loader] Code 0 : Found manifest file
/usr/share/vulkan/explicit_layer.d/VkLayer_unique_objects.json, version "1.0.0"
INFO: [loader] Code 0 : Found manifest file
/usr/share/vulkan/explicit_layer.d/VkLayer_device_limits.json, version "1.0.0"
INFO: [loader] Code 0 : Found manifest file
/usr/share/vulkan/explicit_layer.d/VkLayer_core_validation.json, version
"1.0.0"
INFO: [loader] Code 0 : Found manifest file
/usr/share/vulkan/explicit_layer.d/VkLayer_parameter_validation.json, version
"1.0.0"
INFO: [loader] Code 0 : Found manifest file
/usr/share/vulkan/explicit_layer.d/VkLayer_threading.json, version "1.0.0"
INFO: [loader] Code 0 : Found manifest file
/usr/share/vulkan/explicit_layer.d/VkLayer_image.json, version "1.0.0"
INFO: [loader] Code 0 : Found manifest file
/usr/share/vulkan/explicit_layer.d/VkLayer_object_tracker.json, version "1.0.0"
INFO: [loader] Code 0 : Found manifest file
/usr/share/vulkan/explicit_layer.d/VkLayer_swapchain.json, version "1.0.0"
Cannot create Vulkan instance.
/home/abuild/rpmbuild/BUILD/Vulkan-LoaderAndValidationLayers-1.0.3.g5493/demos/vulkaninfo.c:715:
failed with VK_ERROR_INCOMPATIBLE_DRIVER
-------------------------------

And no Vulkan games ('Dota 2' and 'The Talos Principle') are starting anymore
:-(