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by jrockway
800 days ago
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USB-C to DP is an electrical conversion. The monitor has to negotiate an alternate mode with the USB controller (then the high-speed data pairs in the USB-C cable are used for Displayport signalling and not USB). (There are such things as USB monitors which actually take pixel data over the USB protocol, but I don't think they ever caught on.) |
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DisplayLink. It caught on for a while at least, especially in the case of some dock products that would output to a more conventional display interface but were USB DisplayLink adapters themselves. You’ll see tons of forum and Reddit posts about suboptimal CPU load and performance related to it.
https://en.wikipedia.org/wiki/DisplayLink
It more recently was resurrected to overcome M1 limitations.
https://danielcompton.net/apple-m1-displaylink-multiple-disp...