Thank you for contacting Plugable support! Sorry to hear about this issue. I’d be more than happy to assist you.
Generally speaking flickering is not a sign of a bad dock, but it can indicate some updates may be required (especially on the Windows PC side). For macOS, no updates should be required for the computer itself, so we may need to look into updating the firmware on the dock.
To get a better idea of what’s happening, since the dock has two HDMI ports, does it matter which HDMI port on the back of the dock is used for the monitor(s) that’s flickering? Or does it appear that the flickering occurs with either HDMI port, regardless of monitor model used?
There’s “Display 1” and “Display 2” for the HDMI (and DP ports):
Please don’t hesitate to let us know of other questions.
Thanks again for contacting Plugable support and best wishes!
Joshua Henry
Senior Engineer | Product Owner
Plugable Technologies
As a next step since you have access to a Windows system, let’s try updating the dock firmware there. We can then see if there’s any improvement afterwards for both the Windows and Mac systems.
Install the Genesys Logic driver located in the unzipped folder (file name: GLUSBFLT_SETUP_V3.11.exe) and then reboot your computer when prompted by the installer.
Once logged back in, connect the TBT3-UDZ to a Thunderbolt 3/USB-C port on your laptop.
Run the ReadVersion.bat file in order to ensure the ICs are recognized and to determine the current firmware version. The output should read the same as below with FWVersion 8 and FWSubVersion 5. Then press any key to close the command prompt.
Run the Upgrade_To_Latest_Version_V0A_1_V0A_1.bat (right click and run as administrator) file in order to update the firmware to FWVersion a and FWSubVersion 1. The output should look similar to the below screenshot. Press any key to close the command prompt.
To ensure the firmware has been updated, run the ReadVersion.bat file again and the output should read similar to below stating FWVersion a and FWSubVersion 1.
This seems to have resolved the issue on my PC, but the Mac is still having issues with the monitor dropping out (static and then blank screen then reconnects after a couple seconds). Any suggestions?
Hi Jason, my name is David and I’ll be jumping in for Josh.
Glad to hear that there has been improvement with the Windows system, but sorry to hear of the continuing issues on the M1 MacBook Air.
Can you let us know the specific models of the Dell and Acer monitors you’ve used? If we have the same or similar models in our labs we can attempt to reproduce this issue since its been narrowed down to an issue with the M1 MacBook Air.
Also, can you let us know the macOS version that your M1 MacBook Air is running?