DisplayLink Forum - View Single Post - HDMI Monitor Not Working After macOS 15.4 Update with Dell UD22 Dock

Deceiver · 06-25-2025, 12:09 AM

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.

06-25-2025, 12:09 AM	#19
Deceiver Junior Member Join Date: Jun 2025 Posts: 1	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. Last edited by Deceiver; 06-25-2025 at 02:04 AM.