2nd monitor only duplicates laptop screen

I have a UD-3900 plugged into my dell XPS. I have one DVI monitor plugged into the DVI port on the docking station and the other DVI monitor hooked to the HDMI port through an DVI/HDMI adapter. the monitor that goes through the adapter will only duplicate the laptop screen. do i need a special adapter to convert the DVI to HDMI?

Hi Michael,

Thank you for posting!

In response to your question, I do not believe you need a special adapter.

Based on your description of the behavior, it sounds like we just need to make a small settings change within the Windows Display Settings application.

To expand further, it sounds like one of the displays connected to the dock is configured in ‘Duplicate’ mode within Windows Display Settings. As a result, it is showing a duplicate image of the laptop’s internal display.

My impression based on you description is that you would like both displays connected to the dock to be in ‘Extend’ mode. When in extend mode, a display will be an extension of your overall desktop and allow a unique image to be shown within the display.

To make this change:

  1. Please right-click on an empty space on your desktop and select ‘Display Settings’ from the menu that appears.

  2. The Display Settings application will open, and show a numerical representation of the displays connected to your system at the top of the window. Click the ‘Identify’ button to see how the the numbers relate to your displays.

  3. Most likely, the laptop’s internal display and the duplicated external display will be represented by two numbers separated by a vertical bar, such as ‘1|2’. Click on ‘1|2’ to select it in blue.

  4. Once ‘1|2’ is selected, scroll down to the ‘Multiple Displays’ section within the Display Settings application.

  5. Under the ‘Multiple displays’ drop-down selector, click to change the option to ‘Extend these displays’.

  6. Click the ‘Keep changes’ confirmation button that appears in order to confirm the change.

  7. Both displays connected to the dock should now be in Extend mode.

Please let us know if that information helps!

Thank you,

Plugable Technologies

This topic was automatically closed 20 days after the last reply. New replies are no longer allowed.