Comment 3 for bug 1920670

1 This is screenshot of my screen when that issue happens.

2 I can say that this kind of issue happens not only when I resume system after sleeping but also when I am trying to watch for example full hd video clips or I am dong some work that require a graphic card. This error happens both with Intel and NVIDIA graphic cards. I have tried a lot of things such as

https://askubuntu.com/questions/1279996/ubuntu-20-4-lts-upgrade-graphical-glitches
https://askubuntu.com/questions/1231824/fuzzy-graphics-after-upgrading-to-ubuntu-20-04