Solved by fresh Ubuntu 20.04: https://askubuntu.com/a/1248893/130585

The only problem remained: artifacts on the screen after resume. How to
solve?

** Changed in: linux (Ubuntu)
       Status: Incomplete => Confirmed

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https://bugs.launchpad.net/bugs/1882917

Title:
  Ubuntu freezes after resume from suspend/hibernate in 10-15 sec

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