Thank you for joining the Intel communities.
Try updating your graphics driver; you can download the latest version at the following link:
You can see how to enable clone mode at the following link but I’m not sure if this information will help you but you could try:
Also, I would recommend using straight connection instead of the splitter.
I ran the Windows 7/64 link and the installation asked about overwriting a newer version "Intel HD Graphics 6000 (18.104.22.16852)" so I replied YES. During the install, it said "Installing Driver: Intel(R) HD Graphics 6000 Version: 10.18.14.4332". It created a shortcut on my desktop for "Intel HD Graphics Control Panel", however when I run it, nothing happens. I even tried to run C:\Windows\System32\GfxUIEx.exe directly, but nothing happens. I don't even see it as a process in the Task Manager. Accordingly, I then couldn't follow the instructions given in "How to enable Clone Mode..." because "Graphics Properties..." was not available from right click on my desktop.
Running without the splitter is not an option.
Try uninstalling the driver, restart your system and then install the new one.