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An error occurred while saving the commentSeyi A commented
DETAILED SOLUTION THAT WORKED FOR ME( I am on the latest Big Sur Update)
Display link really just needs to do better. However, I followed these steps.
1. I quit the DisplayLink Manager, went to finder --> Applications, and Uninstalled The DisplayLink App there
2. I downloaded this legacy driver: https://www.displaylink.com/downloads/file?id=1636 I did this three times and it did not work all three times, till I followed the instructions here: https://support.displaylink.com/knowledgebase/articles/1188004
3. Essentially you have to make sure the extension is loaded. Once the display link download installs , make sure in Security & Privacy, nothing is blocked, then restart. If there are any issues, refer to the last link.
Clam Shell mode works just fine for me now.