Thanks. I can see a couple of problems with the machine now, which could
cause this bug:

1. You have the old 'intel' graphics driver enabled. That's no longer
being maintained and should not be used, especially on newer hardware
like yours. Please ensure your Xorg config files do not load the 'intel'
driver and if in doubt just uninstall it:

  sudo apt remove xserver-xorg-video-intel

You should be using the newer 'modesetting' driver which is also the
default.

2. You have a number of extensions installed:

b'org.gnome.shell' b'enabled-extensions'
b"['donotdist...@kylecorry31.github.io', 'docker-
integrat...@jan.trejbal.gmail.com', 'gsconn...@andyholmes.github.io',
'multi-monitors-add-on@spin83', 'custom-hot-corn...@janrunx.gmail.com',
'autohide-batt...@sitnik.ru', 'clipboard-indica...@tudmotu.com',
'openweather-extens...@jenslody.de', 'places-menu@gnome-shell-
extensions.gcampax.github.com', 'sound-output-device-
choo...@kgshank.net']"

so if removing the intel graphics driver hasn't already fixed the bug
then please try to uninstall all of those extensions. Yes uninstall and
not just disable, because a disabled extension can still interfere with
the shell.

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You received this bug notification because you are a member of Ubuntu
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https://bugs.launchpad.net/bugs/1867668

Title:
  Visual artifacts in Gnome Shell after upgrading to 20.04

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