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March 5th, 2021 13:00
Dual Monitors duplicate
Duplicate or Clone Two monitors
Dell Laptop with Docking Station Model D3000. Operating System Windows 10 version 20H2 Build number: 19042.844
Unable to Clone two monitors. Monitor 2 is conneced to HDMI port on Laptop, Monitor 3 is connected to Docking Station HDMI port. In Windows 10 Display Settings when I select Monitor 1 (laptop) > Duplicate to 2 and 3 it only Duplicates to Monitor 2 and Extends to monitor 3. I would like it to Duplicate to 2 and 3 but the setting does not work. Duplicate is required for large Class Room so everyone can see the same thing on each monitor.
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jphughan
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March 5th, 2021 14:00
@bill555 I have a triple display setup and I can only get Windows to duplicate between two displays as well. I've never seen Windows duplicate across three displays. But if that's what you want, then the easiest solution is probably an HDMI splitter. It will take a single source signal and replicate it out of multiple outputs. In that case, your system won't know there are multiple displays on the output side of the splitter. It will just see a single HDMI output, so you can set your built-in display to duplicate to that "single" HDMI output, and the end result will be all displays showing the same content. An HDMI splitter is cheaper than a dock too, and you won't have to deal with the drawbacks of the "indirect display" technology called DisplayLink that gets used by Dell's Dxxxx model docks, including the quite old D3000.
bill555
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March 5th, 2021 17:00
Thanks for the info. Sounds like a Splitter is the way to go.