I have a ‘displaylink-driver’ package from ‘https://www.synaptics.com/sites/default/files/Ubuntu’ repo which provides kernel module ‘evdi’. I have also SecureBoot enabled and MOK key enrolled.
Each time I update kernel, I have the following issue:
As visible on the screenshot, I’ve checked and my MOK key is enrolled correctly. Therefore why this error is listed?
Hi - for what it’s worth, you might have better luck with this one either with provider of that driver package, or at a forum for Ubuntu overall (assuming you’re using KDE Neon) like https://askubuntu.com/
There isn’t really any KDE software involved in the process you’re describing, but folks who are closer to the projects that produce those packages might know more 
