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When I install nvidia drivers after second reboot my screen is black on SDDM (login manager).
Tried to add:
xrandr --setprovideroutputsource modesetting NVIDIA-0
xrandr --auto
to file: /usr/share/sddm/scripts/Xsetup from here
After 20 hours of headache, I found the only solution for myself: replace default SDDM to LightDM.
On black screen:
sudo apt install slick-greeter lightdm lightdm-settings apparmorsudo reboot now