This whole sub-thread is just a really good hilarious demonstration of the whole problem, nobody has any idea how to figure out what a given cable or port will do anymore. We can't even talk about it without getting confused. (But can still be snarky to others who we think got it wrong, even when we're wrong ourselves. It's the internet, we'll never run out of superciliousness!)
I've dealt with it too. Some USB c extenders even won't carry some signals, such as video. It's an unbelievable frustrating mess. Just because thunderbolt uses the same USB c style connector doesn't make it usb c I wouldn't think. I figured the connector itself would have its own name, such as rj45 does. But who knows with this shit show.
USB 3.2 is not Thunderbolt. USB 3.2 achieves 20Gbit/s with signalling that is entirely incompatible with Thunderbolt signalling. It is completely possible to have a 20Gbit/s USB 3.2 port that has no Thunderbolt capabilities.
The first USB standard to incorporate Thunderbolt functionality is USB 4.
the point i made is just as true though, as the announcement that thunderbolt switched to the usb-c form-factor is 6yrs old now. (and was even linked to from someone else in this thread!)
the downvotes just show once again how hilariously dumb the average hn-reader is.
It doesn't matter whether the point you were trying to make is true or not, because Thunderbolt is irrelevant to the problem that was described. DP Alt mode is not the same thing as encapsulating a DisplayPort stream in Thunderbolt signalling, so knowing which of your laptop's Type-C ports is Thunderbolt-capable does not tell you anything about which of the ports is capable of DP Alt mode.
Stop calling people dumb until you can make a comment that is at least somewhat correct and on-topic.
