RE: U2417H, DP 1.2 daisy chain mirrors, but does not extend.
MST (Multi-Stream Transport) and DP 1.2 are the same thing.
Which is why I stated above, "The second in the chain should be set to MST/DP 1.2 Off.". As I showed in the picture, the U2417H manual calls them both out, "DP1.2 with MST option". As does your U2717D manual =
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