You’re most welcome for the support, thanks for bearing with us through this!
“Unfortunately, after the upgrades to the Thunderbolt and graphics drivers, one of the other docks I have (UD-6950H) started mis-behaving after working for several months. The displays repeatedly connect/disconnect. I tried many things to get that to stop as I needed to work at home but I was not able to resolve that issue. Rolled back both drivers, double checked for upgrades and tried the troubleshooting steps on Displaylinks site. Something certainly seems amiss.”
Ah! I actually believe I know why. With the most recent Intel Graphics drivers (184.108.40.20666) that were released, we’ve seen some reports that DisplayLink DL-6xxx series chipsets can encounter issues like you’ve described. I’d have expected rolling back the GPU drivers should have helped here, but since the issue remains, you may see if these newest drivers from DisplayLink that were released earlier this week fix the issues with the UD-6950H (https://www.displaylink.com/downloads/file?id=1728). The DL-3xxx series like your vertical USB 3.0 docks were fortunately unaffected.
In the release notes DisplayLink specifically mentions: “DL-6xxx: fixed issue with Intel driver xx.yy.100.9458-9466 for Intel 11th generation GPUs (33008)”
I would personally recommend a full clean install of these drivers versus an upgrade, here’s how:
Disconnect the dock from the system and please remove the power cable from the dock so it turns off completely. Please keep it disconnected until the last step.
Uninstall any and all software with ‘DisplayLink’ in the title that is present from within the Control Panel -> Programs and Features. Don’t worry if these entries are not present or if the process does not work, just move onto the next step.
Download, extract and run the DisplayLink cleaner tool, found here --> http://www.displaylink.com/downloads/file?d=64 and ensure it displays “Cleaning Complete”
when done (video walk-through if you need it -> https://youtu.be/AcVV1gD_FvI)
Once the Cleaner has been run, reboot (even if not prompted to)
Now download and install the 10.1 M1 DisplayLink software, found here --> https://www.displaylink.com/downloads/file?id=1728
Reattach the power cable to the dock first. Once the dock is powered on, reconnect it to your system which will trigger the final portion of the installation. If the device is not detected, please reboot the system.
If the issue remains with the UD-6950H, we might try manually installing one revision back of the Intel Graphics drivers.
“I am leaning on returning both the horizontal and the one of this topic and replacing with the known working ones and leaving it at that.”
That’s of course an option, though hopefully the above suggestion might help bring back stable operation of the UD-6950H. I think the TBT3-UDZ is the only dock that I believe we won’t be able to immediately resolve the issues with.