2 Monitors Detected, but only 1 displaying picture

[SqueakyNinja]

Originally Posted by jochem

I have exaclty the same issue on my M1 with Monterey:

macOS Monterey version 12.3.1
MacBook Pro M1, 2020
Display Link 1.6.1

Both screens detected but only one showing something. Other screen is turned on and auto detected on HDMI port but nothing showing.

One screen is a 1440p 144hz other is 1080p 144hz. The 1080p is not working. When i mirror display from main to the 1080p monitor all monitors work but that is useless.

Tried other ports on monitor, different cables, different resolutions but nothing works. Other setup with two of the same monitors (different from what iam using now) does work without any problems. Maybe the issue is two external monitors with different resolutions?

I've got two identical Dell U2515H, where the second one doesn't work unless being mirrored to. So I have the same resolution for both, and the same issue.

I did however luckily solved the issue for me. I swapped places of my HDMI cables, and then it worked. I guess on of the cables are of an older version and wasn't compatible with the displaylink adapter.