# cat /etc/issue
Ubuntu 18.04.5 LTS \n \l
# lspci | grep -i nvidia
0a:00.0 VGA compatible controller: NVIDIA Corporation GP102 [GeForce GTX 1080 Ti] (rev a1)
0a:00.1 Audio device: NVIDIA Corporation GP102 HDMI Audio Controller (rev a1)
# ubuntu-drivers devices
vendor : NVIDIA Corporation
model : GP102 [GeForce GTX 1080 Ti]
driver : nvidia-driver-390 - distro non-free
driver : nvidia-driver-440-server - distro non-free recommended
driver : nvidia-driver-435 - distro non-free
driver : nvidia-driver-440 - distro non-free
driver : nvidia-driver-418-server - distro non-free
driver : xserver-xorg-video-nouveau - distro free builtin
apt install -y nvidia-driver-440-server
# nvidia-smi
NVIDIA-SMI has failed because it couldn't communicate with the NVIDIA driver. Make sure that the latest NVIDIA driver is installed and running.
reboot
2，重新安装nvidia驱动
apt-get purge nvidia*
add-apt-repository ppa:graphics-drivers/ppa
apt-get update
# ubuntu-drivers devices
vendor : NVIDIA Corporation
model : GP102 [GeForce GTX 1080 Ti]
driver : nvidia-driver-410 - third-party free
driver : nvidia-driver-450 - third-party free recommended
driver : nvidia-driver-390 - distro non-free
driver : nvidia-driver-418-server - distro non-free
driver : nvidia-driver-415 - third-party free
driver : nvidia-driver-435 - distro non-free
driver : nvidia-driver-440-server - distro non-free
driver : xserver-xorg-video-nouveau - distro free builtin
apt install nvidia-driver-450 -y
reboot
参考：