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brettcp81
1 Copper

XPS 13 (9350), three U2415, disable laptop screen

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I have an XPS 13 9350 Core i5 (with Thunderbolt/USB type C).  Using a USB 3.1 type C to DisplayPort adapter connected to the XPS 13, then daisy chaining the monitors via DisplayPort cables (regular displayport, not mini displayport).The windows device manager sees all three Dell U2415 (DisplayPort) monitors.  Here's what I've found through troubleshooting:

If I have DP 1.2 enabled on monitors 1 and 2, and disabled on monitor 3, I get an extended desktop spanning across monitors 1 and 2, but a black screen on monitor 3.

If I leave all three monitors to DP 1.2 disable, I get my XPS 13 screen CLONED on all three U2415's.

If I set monitor 1 to DP 1.2 enable, then monitors 2 and 3 to DP 1.2 disable, I get an extended desktop on monitor 1, but monitors 2 and 3 are cloned.

What I need is to use all three U2415 monitors in extended mode, not cloned.

Is this not possible for some reason?  I've even tried three different U2415s (which I have at my office) with the same result, just to rule out the chance that I had a bad one.

Thank you!

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brettcp81
1 Copper

RE: How can I use three U2415 displays with my XPS 13 9350 ?

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Update: I was able to get all 3 U2415's working in extended desktop - I had to disable the XPS 13's built-in display via Windows Display Settings, then I was able to enable monitor #4 (which is the 3rd U2415) and all is now well.  Apparently the XPS 13 9350 cannot drive 4 total monitors (including its own) at once extended desktop mode?Which is OK for me as I'll be using this setup with the XPS 13 closed anyways.

WUTWUT1
1 Copper

RE: XPS 13 (9350), three U2415, disable laptop screen

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Did you suffer any input lag from using 3 monitors?

I currently have 3 U2415's as well, but I'm thinking about getting a 9350 to daisy chain them. Please let me know your experience.

Thanks.

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