Also verified fixed myself, using:
https://launchpad.net/ubuntu/+source/nvidia-graphics-drivers-525/525.78.01-0ubuntu1
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https://bugs.launchpad.net/bugs/1799679
Title:
Thanks for the bug report. Do you have any part of the screen changing
constantly, such as performance info in the top bar or overlays?
Please also test without 'plank' and 'firefox' running. Because Xorg's
high-ish CPU usage suggests the problem is originating from an
application.
** Changed
** Tags added: kinetic
** Also affects: nvidia-graphics-drivers-525 (Ubuntu)
Importance: Undecided
Status: New
** Changed in: nvidia-graphics-drivers-525 (Ubuntu)
Importance: Undecided => High
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Desktop Bugs,
> I discovered that this bug is only triggered in my setup
> (laptop screen + 2 external screens) when workspaces are
> set to "Dynamic workspaces" (Settings - Multitasking - Workspaces).
> When I set it to "Fixed number of workspaces" (4 in my case),
> the problem disappears.