M1 Pro audio and video continuously cutting when more than 1 monitor connected

USB Docking Stations UD-ULTC4K
#1

On an M1 with Ventura 13.0.1 (22A400)
Can’t use more than 1 monitor at the same time

After a couple of hours running, video starts randomly flickering on one or the other monitor (except 1 on port 1) as you move your mouse, switch desktops or some times doing nothing.
At some point the video output just disappears completely for 5-6 seconds.

One of those monitors is the one I use as my audio output and it continuously cuts out every two seconds (again, not with the one on port 1) and is same with the device’s audio output.
In the USB list the “Plugable audio” just apears and desapears every second.

I tried all combinations of HDMI or DP with the same result.
With another set of cables. Same.
Completelly disconect the device for a while. Same result. + uninstall-restart-reinstall DisplayLink. Same.

The box says “Video Output 3” is the one that requires DisplayLink but I can’t get “Output 2” to work without it.

I want it to hove one more monitor but I ended up having to turn back to my old Caldigit TS3 that works perfectly with the same setup of monitors, cables, devices connected, etc.

#2

Hello Nelson,

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

Thank you for the detailed explanation of the issue you’re experiencing, and also thanks for letting me know what you’ve tried.

It’s quite interesting that you were able to observe the Plugable Audio device actively appearing and disappearing. This makes me suspicious of a possible problem with the DisplayLink USB graphics chipset in the docking station. For context, the DisplayLink DL-6950 chipset in this dock drives two of the three video outputs (2 and 3), Ethernet, and audio (for the front 3.5mm and for video outputs 2 and 3).

Since the drivers haven’t helped, and moving things around hasn’t helped, I think that this may be a case where we will want to send you a new pretested (known-good) replacement dock under warranty. This way we can at the very least rule out the hardware as a possible issue. I will contact you directly via email shortly so we can arrange to send one out.

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

Thanks again for contacting Plugable support and best wishes!

Joshua Henry
Senior Engineer | Product Owner
Plugable Technologies

#3

Hi Joshua,

Thanks for the answer.

Do you have any news?

#4

I had emailed you on Tuesday! If you have not received it be sure to check your junk/spam folder.

I will try sending a follow up email as well.

Best wishes,
Josh

1 Like
#5

Thanks Joshua,

You are 100% right, I did not saw it before.
Already send the information.

Thanks for the awesome support.

#6

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