卸载驱动

apt-get --purge remove nvidia*
apt autoremove
apt-get --purge remove "*cublas*" "cuda*"
apt-get --purge remove "*nvidia*"

reboot

安装驱动

add-apt-repository ppa:graphics-drivers/ppa
apt install ubuntu-drivers-common -y

ubuntu-drivers devices
apt install nvidia-driver-460 -y

lsmod | grep nouveau

reboot

参考：

1. Ubuntu 卸载nvidia驱动