How many kinds of USB-C to USB-C cables are there?
After buying a screen which has only a USB-C DP-Alt-Mode input, I was recently in the market for a matching cable. My only requirements were “it should be as long as possible, at least 2 meters” and “it needs to support DP-Alt-Mode”.<p>Now I thought this would be easy, just ask Google what kind of cable I need, right...? Well... no. Not at all. I wasn’t able to find any information whatsoever what kind of USB-C cable is needed for supporting Alt-DP-Mode. I guessed (really guessed, couldn’t find information) a USB 2.0 USB-C cable wouldn’t be good enough. But is a 5Gbps cable enough? Or is a 10Gbps cable needed? Or maybe neither and I need to buy one of those really expensive USB-C Thunderbolt 3 cables...?<p>In the end I just bought a 2 meter USB-C 3.2 5 Gbps and just hoped for the best. And indeed it works. Yay!<p>The thing is... I’m a technical person, and even I can’t figure this out. How is a non-technical person supposed to navigate this?<p>And by the way: one piece of information I did find about USB-C and Alt-DP-Mode is that the current spec for Alt-DP-Mode doesn’t allow use of active cables, so length is limited to 2 meters. That’s another pitfall restriction.