I think they mean it should show up as part of the error message provided by the OS. "Error, the cable you used to connect <human-readable monitor identifier> d

I think they mean it should show up as part of the error message provided by the OS. "Error, the cable you used to connect <human-readable monitor identifier> doesn't support <thing needed>." "Error, the dock <human-readable dock identifier> doesn't support <thing needed>, which <human-readable peripheral identifier> requires." Identify the limiting component, explain the what the new cable/dock/hub/etc needs to support so the customer has an actual chance of getting things to work!