what I did before re-installation:
sudo apt-get --purge remove nvidia-*
sudo apt-get --purge remove libnvidia-*
udo dpkg --force-all -P nvidia-firmware-535-535.54.03 nvidia-kernel-common-535 nvidia-compute-utils-535 libnvidia-decode-535 nvidia-driver-535
udo dpkg --force-all -P nvidia-*
udo dpkg --force-all -P libnvidia-*
sudo apt autoremove
sudo apt autoclean