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Dual U2518D, Latitude 5580, WD15 dock, Daisy chain
Hi Chris -
I have
- Latitude 5580 (running Windows 10 Pro),
- NVIDIA GeForce 940MX driver 22.21.13.8266 (6/25/2017)
- a WD15 dock station
- two U2518D monitors.
I followed your instructions, except that I did not install two drivers that are out of date:
(These aren't relevant, are they?)
Now that they are daisy chain wired, I only see two monitors.
- my laptop monitor
- my U2518D monitor
I would expect to see three (right?)
I have set to "extend my monitors", but I'm seeing same image on both of my U2518D monitors. (Laptop monitor is different). Also I updated my driver for the GeForce 940 MX to 23.21.13.9135 (3/23/2018), but still have the issue. Just two monitors listed on the Display Settings - my laptop and one of the U2518D monitors).
Please advise.
Thanks, Kirk
DELL-Chris M
Community Manager
Community Manager
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April 8th, 2018 14:00
The U2518D supports 2560x1440 60Hz. This is a limitation of the WD15 dock.
Open the WD15 User's Guide to page 30. See the "Display resolution" table.
Dual Display (maximum resolution) =
2x FHD or WUXGA (1920x1080 60Hz)(1920x1200 60Hz)
Open, "How to Use and Troubleshoot the WD15", "Supported Display Resolution" table =
One monitor at 2560x1440 60Hz
Two monitors at 1920x1080 60Hz or 1920x1200 60Hz
The TB16 could support two U2518D running at 2560x1440 60Hz.
Latitude 5580 USB Type-C out port --> TB16 USB Type-C cable
TB16 DP out port --> U2518D DP to mDP cable --> #1 U2518D mDP in port
TB16 mDP out port --> U2518D mDP to DP cable --> #2 U2518D DP in port