Monitor without DisplayPort Alt Mode

[snakes-]

Does every usb c display use DP Alt mode ? Or can i use some monitors without DisplayPort Alt Mode when connecting to usb c?

 

[Amethyst1]

Does every usb c display use DP Alt mode ?

Yes, unless it’s explicitly stated to use DisplayLink. There's a specification for HDMI Alternate Mode over USB-C but no display uses that AFAIK.

Or can i use some monitors without DisplayPort Alt Mode when connecting to usb c?

DisplayLink works over any USB connection and doesn’t require DisplayPort Alternate Mode, but it has some quirks and isn’t as “smooth” as a directly connected display.

 

[Basic75]

Yes, unless it’s explicitly stated to use DisplayLink.

I believe Thunderbolt displays don't use DisplayPort Alt Mode, they use the DisplayPort embedded in the Thunderbolt. That makes three possibilities for how a USB-C monitor connects to a computer, DP Alt Mode (the most common), Thunderbolt (less common) and DisplayLink (the fake video port, also less common).

 

[Amethyst1]

I believe Thunderbolt displays don't use DisplayPort Alt Mode, they use the DisplayPort embedded in the Thunderbolt.

Correct. I didn't think of Thunderbolt monitors when I read "USB-C display". Not every "USB-C monitor" is a Thunderbolt monitor.