Acer Switch 10, scale to full screen in dual display with HDMI

Hello:

I have recently buyed an Aspire Switch 10, which uses an Intel Atom processor and Intel HD graphics. I have connected the system to a TV through HDMI and I want to duplicate the image both on the PC and on the TV. However, the problem that I have is that the TV shows huge black borders. This is because I cannot set the TV to scale the image to full screen. I have updated the drivers of the graphics adaptor and I still have the same problem. In the Intel Control Panel, the only option for the TV is to center the image.

It’s very annoying, since I have another cheaper devices which can scale the image through HDMI without problems.

Can you give me any solution?

Thanks in advance.

Regards.