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-
Can't confirm if this is Nvidia or DisplayLink or both drivers issue.
For sure, in my case, uninstalling DisplayLink driver everything works
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Packages, which is subscribed to nvidia-graphics-drivers-375 in Ubuntu.
Lagging square around mouse pointer
Status in nvidia-graphics-drivers-375 package in Ubuntu:
Status in nvidia-graphics-drivers-384 package in Ubuntu:
Status in plasma-workspace package in Ubuntu:
(This can also be an nvidia related problem)
Mouse pointer behaves as if it has an invisible square attached to it.
This square covers some area next to the pointer, but it is not always
clear exactly where (a link to a screenshot is shown below, please
note the white square with some text from the previous webpage
displayed in that window).
This makes selecting text difficult, as one never knows where exactly
the selection ends. Also, scrolling in some windows becomes
problematic, as the pointer shadows a part of the scrollbar. When a
text is being typed, one needs to make sure that the pointer is parked
sufficiently far from the text (so, to make a long story short, this
is very annoying).
This behavior does not depend on the choice of the cursor theme.
(A link to the screenshot: https://goo.gl/photos/92KKGyFs3AkdxYb79)
DistroRelease: Ubuntu 17.04
Package: plasma-workspace 4:5.9.4-0ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-19.21-generic 4.10.8
Uname: Linux 4.10.0-19-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
Date: Wed Apr 19 10:41:58 2017
InstallationDate: Installed on 2015-06-05 (684 days ago)
InstallationMedia: Kubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
UpgradeStatus: Upgraded to zesty on 2017-04-13 (5 days ago)
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