4K dock vs 1080p ViewSonic monitor... no one is winning!

I recently purchased the 4K Docking Station for my office. Conceptually it’s a great way to connect all my devices to my Mac with a single cable (YES!!!).

However, my ViewSonic 1080p LED monitor is not agreeing with the dock for some reason. I purchased a DP to DVI cable and am not getting a signal.

Your advice is welcome and appreciated!

Hello Chris,

Thank you for contacting Plugable support! Sorry to hear about this issue. I’d be more than happy to assist you.

Can you tell me what model monitor you are using that is not working? Also can you link me to the DP to DVI cable purchased?

Also, have you already installed the DisplayLink drivers for the dock? These will be required for the two DisplayPorts to function.

Install the drivers ( https://s3.amazonaws.com/plugable/bin… ) and after then immediately check Gatekeeper to make sure it is not blocking them from running ( https://plugable.com/2017/10/27/how-t… ).

Please don’t hesitate to let us know of other questions.

Thanks again for contacting Plugable support and best wishes!

Joshua Henry
Plugable Technologies

Okay, so here is the update.

I was able to approve the software from gatekeeper and it’s “trying” to feed to all of the monitors now… but my primary machine is stuck in the window I’m sending an image of. The additional monitors are black… but power lights are indicating they are trying to wake up.

The cable I’m using is the one at this link:


Hi Chris,

Thanks for approving the drivers in Gatekeeper. The picture you’ve attached is quite interesting. I can’t say I’ve seen this kind of issue pop up before.

I want you to try the following. Disconnect the dock and leave it disconnected for now. Let’s then try an SMC reset on the Mac, and see if its screen comes back normally.

  1. Choose Apple menu > Shut Down.

  2. After your Mac shuts down, press Shift-Control-Option on the left side of the built-in keyboard, then press the power button at the same time. Hold these keys and the power button for 10 seconds.

(If you have a MacBook Pro with Touch ID, the Touch ID button is also the power button.)

  1. Release all keys.

  2. Press the power button again to turn on your Mac.

Then once powered on and booted back into macOS, hopefully the screen is back to normal. Now you can try connecting the dock again. I’d attach one monitor at a time to the dock as well.


Still no go.

I did the reset just fine. I did enough trouble shooting to know that either port will work individually through the dock… but they won’t work together. I get that same screen when I plug them both in at the same time.

Please advise. It would be really good if we could hop on a call and knock this out. would really like to get it working so I can get back into a rhythm of work.


Also, I used to be able to use the two additional monitors through two different usb c ports on my MacBook Pro and with the software installation and reset I cannot do that anymore either. :frowning:

In other words, we have digressed at this juncture.

Hi Chris,

Sorry to hear that didn’t help, and that after the reset you’re unable to connect some USB-C video adapters for more monitors. That’s certainly unexpected and may indicate a potential issue with the system itself.

Unfortunately we do not offer phone support, but I don’t think it would really make much of a difference in this scenario. We’re going to look at some things that can’t really be easily covered in a phone call.

Please contact us directly at support@plugable.com and send us a system report as an attachment:

Instructions to send are near the bottom, but this might give us some insight into the issue.


Just sent it over.