I have bought a HDMI (to USB-C) cable that supposedly supports 4k @ 60Hz via HDMI 2.0.
The cable is called
Uni USB C to HDMI Cable (4K@60Hz) Space Grey. Amazon link
I do not get it to work at 4k60, I have tried with a Windows Laptop (Lenovo Yoga 720-13) which I am not sure supports 4k60, and a MacBook Pro 13 2020 which supports 4k60.
I have used a LG 27UD58P-B Display which supports 4k60 according to LG. Moreover I have been using this display for years with DisplayPort at 4k60.
Is there any way (maybe some commands or software) to find out whether this cable really supports HDMI 2.0 and/or 4k60?
So far I have tried to use
cscreen on MacOS to list all the available modes of the display, and the highest available option supporting 60 hertz is
2560x1440. Is this a possible indication that the cable really does not support HDMI 2.0?