I bought the Icy Box as a docking station for the Lenove X1 Carbon which I also bought new.
I have the problem that when I want to use the docking station with two monitors via HDMI, the two monitors only display a resolution of 1600x900. I have already tried to change something on the notebook, then I reset the monitors. It does not help.
When I connect a monitor via VGA, I get 1920x1080 on VGA but only 1600x900 on HDMI. What else can I set?

Question

I bought the Icy Box as a docking station for the Lenove X1 Carbon which I also bought new. 
I have the problem that when I want to use the docking station with two monitors via HDMI, the two monitors only display a resolution of 1600x900. I have already tried to change something on the notebook, then I reset the monitors. It does not help. 
When I connect a monitor via VGA, I get 1920x1080 on VGA but only 1600x900 on HDMI. What else can I set?

Answer

Your notebook may not have a usb-c that supports DP. Try connecting a monitor directly to the notebook with HDMI. If this works, then it is almost certainly due to the USB-C.

DisplayPort™-over-USB Type-C enables full DisplayPort A/V performance (monitor resolutions of 4K and more), data transfer over SuperSpeed USB (USB 3.1) and up to 100 watts of power with the convenience of a reversible plug and cable that work both ways.

Your data. Your choice.

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