HDMI Monitor Not Working After macOS 15.4 Update with Dell UD22 Dock

[uishon]

Just upgraded to new Display Link 1.12.2 the other day.
HDMI with Dell UD22 still doesn't work.
Any ETA for a fix?

[samjaydev]

I am using a UD22, and after upgrading from macOS 15.1 to 15.5, HDMI no longer works through the dock—however, connecting HDMI directly to the MacBook still works. Could someone please provide an ETA for a fix as soon as possible?

[zcbtek3]

I have tried emailing DisplayLink 5 times and no response? Is there any ETA on a fix for this?

[EMBkk]

I have the same issue. Looking forward to an update.

[Deceiver]

Thread bump.

I have been experiencing this since day 1 with my UD22 paired with my M4 Macbook Pro M4 Pro. I've managed to get by without the HDMI by using the onboard one, but it's cumbersome when using another machine with the dock.
I also found some USB-C ports did not work, as well as USB-A.

Speaking of which, I recently upgraded another machine to an M4 Macbook Air.
Last night I decided to use the Air with the dock for the first time, and to my surprise, everything that didn't work on the Macbook Pro does work on the Macbook Air.
Both are running Sequoia 15.5 and latest (June 12 2025) DisplayLink drivers.

I spoke to Dell, mentioning the previous staff replies in this thread, but they have passed the buck and claim it's an issue with macOS.

Edit: I have now opened a support case with Apple's Level 2 support. They see there is clearly an issue and will be investigating it further. I have a follow up call booked with them on July 1st 12:00 +10
Annoyingly, I did link them to this thread, but security measures mean they are unable to view it.

[MariusJ]

Hi guys. Just thought I'd share my findings.

I've had the same issue since upgrading to Sequoia 15.5, but every once in a while I happened to activate both screens. For the last couple of weeks I only managed to get one..

Then, a few days ago I disconected the dock and macbook for a couple of hours and also disconnected the dock from the power supply. Then when I reconnected everything I got two screens. Since then it's worked just fine. I have both screens activated whenever I connect again.

A colleague of mine experienced the same issue as the rest of us, but when I suggested to disconnect everything (including power) for a few minutes it worked.

This suggests to me that it has something to do with the HDMI handshake..

Either way, just a suggestion for you guys. It's worked for me a couple of times now,

[mjaroch]

Hello MariusJ,

Thank you for sharing what worked for you.
Your input could be really helpful for others facing similar challenges.
We truly appreciate it.