The 'No Monitor' issue: issue & system detail & temporary "fix"

[zach-h]

I have a MacBook Pro driving 2 24" Dell monitors through a dock via DisplayPort (system detail below). When waking up from sleep, my system almost always loses one or both monitors, blanking them and popping up the screen sharing picker asking me how I want to use 'No Monitor'.

Steps I've taken to fix

• Deleted and reinstalled DisplayLink Manager latest version 1.12.3 using the official tools
• Searched for firmware updates for all involved hardware (there are none)
• Tried other MacBook Pro USB-C ports
• Swapped out USB-C cables
• Swapped out DisplayPort cables
• Swapped out dock (started with Targus, switched to Wavlink)

None of these addressed the issue.

The only "fix" currently working
With your system running and your dock connected via USB-C:

1. Power off the dock
2. Disconnect DisplayPort cables
3. Power on the dock
4. Connect DisplayPort cables

At this point your monitors should be properly recognized and working. Until the system goes to sleep again.

I'm having to do this very frequently, the monitors are dropped 95% of the time the system goes to sleep. This applies to both the Wavlink and Targus docks.

System Overview

• 16" MacBook Pro M3 November 2023 running macOS Sequoia 15.5 & DisplayLink Manager 1.12.3 Build 81
• 2x Dell U2312HM 24" monitors
• Wavlink Ultra 5K Dock model WL-UG69DK1 Rev.A
• Targus 4K Docking Station model DOCK180

I have the system profile .zip generated by the DisplayLink Support Tool, but I get an 'entity too large' error when trying to upload and attach to this post. Your file guidelines state 250mb is the limit for .zip files, this one is only 21.9mb, no idea why it's failing. Meanwhile I'm attaching some related screenshots.

I'm hoping this information leads to a quick fix! Dealing with this issue multiple times throughout the workday is a real drag, to put it mildly.

DLM-displays-recognized.jpg

DLM-no-monitor.jpg

macOS-picker-no-monitor.jpg