Black screen of death with only white underscore

Hi,

I have still the same problem with Kali. If I am not working and I leave my laptop with Kali there is a black screen of death with only white underscore in the left top corner. Nothing more.
I am confused and I think that is the problem with nouveau imeout.

What is going on guys? How to fix this issue?

Kali version:

Code:

lsb_release -a No LSB modules are available. Distributor ID: Kali Description: Kali GNU/Linux Rolling Release: 2020.1 Codename: kali-rolling

Black screen of death with only white underscore - nouveau timeout