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

[renan]

Hello everyone,

I've been using DisplayLink with the Dell UD22 dock for the past two years, connected to my MacBook Pro M3 Max. My setup includes three Dell monitors: two P2418D models (connected via DisplayPort) and one P2219H in vertical orientation (connected via HDMI). The dock itself is connected to the MacBook via USB-C.

Everything has worked flawlessly until today, when I updated my system to macOS 15.4. After the update, the third monitor (the P2219H connected via HDMI) stopped working. The other two monitors continue to function normally.

I’ve already tried several troubleshooting steps, including updating the system further to macOS Sequoia 15.5, but the issue remains.

I rely on all three monitors for my work, and this issue is seriously affecting my productivity.

Has anyone else experienced this, or does anyone know of a potential fix?

Thanks in advance for your help.