Daniel, thanks for your reply.
As per your instruction, yes selecting 'Ubuntu on Wayland' solves the
issue.
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https://bugs.launchpad.net/bugs/1894903
Title:
Changing orientation to port
Public bug reported:
Dell Ultrasharp u2515H HDMI <-> HDMI Intel NUC
Xiaomi Mi Display 34" DP<->USB-C Intel NUC
When setting a second screen in portrait mode it creates artifacts,
checkerboard pattern on moving content on primary screen. If I set it
back to landscape there is no issue.
Multiple f