This message was posted on behalf of Intel Corporation
Yes, you are right, for Windows you will find proper drivers at https://downloadcenter.intel.com/search?keyword=NUC6i7KYK but since you are currently running Linux, you will find graphics drivers https://01.org/linuxgraphics/downloads/stack, please try updating to the latest Linux drivers.
Thanks for the reply. I've found the Intel graphics update tool for linux (v2.0.3) and have installed that, but I'm afraid I'm still seeing the flickering.
Is there any debug information that I can provide that would be useful?