Second monitor no longer working on my Mac

[displaychecks]

My monitors have worked peacefully for months. Just yesterday the second monitor has stopped being recognized. The first monitor works fine, and when I switch the HDMI cables in the dock the functional monitor switches and the second monitor works just fine but the first is not recognized.

Configuration:

14-inch MacBook Pro, M1, 2021
MacOS: Sequoia 15.1
Dock: Kensington SD4900P
DisplayLink version: 1.11.0 (build 28)


I've tried turning everything off, updating my Mac to the current version of sequoia, uninstalling and reinstalling displaylink manager, and power cycling the doc (both with the button and removing the power cord for 1 min). Nothing has worked.

[supershnee]

I have been using my DisplayLink devices without any issues for several months. My setup includes:

DisplayLink Docks (used one at a time):
Pluggable USBC-6950M
Satechi Triple 4K Docking Station
Monitors:
Dell monitor
KCTC monitor
Laptop:
2024 MacBook Air running Sequoia 15.1
Issue Description:

On November 2nd, after my MacBook Air woke from sleep mode, the KCTC monitor stopped working with both of my DisplayLink docks. The Dell monitor continues to function perfectly with the DisplayLink docks, and the KCTC monitor works when connected through the Apple-branded dock. This suggests that the issue is specifically between the KCTC monitor and the DisplayLink docks.

Troubleshooting Steps Taken:

Tested both DisplayLink docks individually with the KCTC monitor.
Used multiple monitor cables to rule out cable issues.
Performed several system reboots and reconnected all devices.
Verified that the DisplayLink docks' Product IDs are correctly recognized by the system.
Noted that, on rare occasions after multiple attempts, the KCTC monitor is detected by the DisplayLink docks, but this is inconsistent.
Request for Assistance:

What could be causing the sudden incompatibility between my DisplayLink docks and the KCTC monitor, and how can I resolve this issue?

Additional Information:

The issue began without any known changes to the system or hardware.
Other peripherals connected to the DisplayLink docks function without issues.
No error messages or alerts appear when the KCTC monitor fails to connect.

[rboerner]

I have been using my DisplayLink devices without any issues for several months. My setup includes:

DisplayLink Docks (used one at a time):
Pluggable USBC-6950M
Satechi Triple 4K Docking Station
Monitors:
Dell monitor
KCTC monitor
Laptop:
2024 MacBook Air running Sequoia 15.1
Issue Description:

On November 2nd, after my MacBook Air woke from sleep mode, the KCTC monitor stopped working with both of my DisplayLink docks. The Dell monitor continues to function perfectly with the DisplayLink docks, and the KCTC monitor works when connected through the Apple-branded dock. This suggests that the issue is specifically between the KCTC monitor and the DisplayLink docks.

Troubleshooting Steps Taken:

Tested both DisplayLink docks individually with the KCTC monitor.
Used multiple monitor cables to rule out cable issues.
Performed several system reboots and reconnected all devices.
Verified that the DisplayLink docks' Product IDs are correctly recognized by the system.
Noted that, on rare occasions after multiple attempts, the KCTC monitor is detected by the DisplayLink docks, but this is inconsistent.
Request for Assistance:

What could be causing the sudden incompatibility between my DisplayLink docks and the KCTC monitor, and how can I resolve this issue?

Additional Information:

The issue began without any known changes to the system or hardware.
Other peripherals connected to the DisplayLink docks function without issues.
No error messages or alerts appear when the KCTC monitor fails to connect.

Please do not double-post about an issue you have reported in a separate thread --> https://www.displaylink.org/forum/showthread.php?t=69400