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June 17th, 2020 17:00

P2419HC + P2419H, MacBook Pro, daisy chain with USB Type-C, #3

Charles27  Did you have any luck in getting daisy chaining working  for your Mac with Dell monitors?

Thanks,

Sree

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June 17th, 2020 21:00

@Sree9  It still doesn't work.  Here is a Reddit post from a month ago talking about it yet again.  The only way I can think of for how @Charles27 got a "daisy chain" working is based on his reference to having DisplayLink software installed.  DisplayLink allows displays to be connected via garden variety USB ports because DisplayLink uses a driver to send video as regular USB data.  So I'm thinking that somewhere in the "daisy chain" as a DisplayLink adapter dongle, maybe something like this one, that was plugged into a USB data port built into the first display and provided a video output that could be run to the second display.  In that setup, the cabling would look very similar to a DisplayPort daisy chain, and as long as there was a USB data path between the first display and the Mac -- which would exist over a USB-C connection -- then that second display would be detected as an independent display.  But in reality, that second display is being detected through a USB peripheral plugged into a USB port that just happens to be built into the first display.  That wouldn't be a DisplayPort daisy chain.  And DisplayLink comes with a raft of drawbacks that can be significant for some people's use cases.

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