Have the same issue. My system: Ubuntu 16.04.5, latest updates. Unity desktop. Nvidia 384.130 driver. DisplayLink 4.2, tried also with 4.1, the same issue.
I also uploaded 12 seconds video: https://www.youtube.com/watch?v=vVwa- cVU_cA Can't confirm if this is Nvidia or DisplayLink or both drivers issue. For sure, in my case, uninstalling DisplayLink driver everything works fine. -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to plasma-workspace in Ubuntu. https://bugs.launchpad.net/bugs/1684240 Title: Lagging square around mouse pointer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-375/+bug/1684240/+subscriptions -- kubuntu-bugs mailing list firstname.lastname@example.org https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs