Issues related to connecting Thinkpad X1E 4K to an external 4K TV via HDMI 2.0

Hi, I have some issues:

  1. I want to set the scaling of my laptop’s LCD to 200% while the scaling of my 4K TV to 100%. However, changing the setting of one changes the setting of the other automatically. It looks like for extension mode, independent setting of scaling is not possible.

  2. Mirroring. Does not work in both Intel HD iGPU and Nvidia 1050 Ti modes. The TV screen states. “No signal. Check the external input or select another input using the INPUT button.”

Could you please let me konw how to fix them? Thanks