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I want to install and run a driver that supports the GPU, but it doesn't start.
Installed referring to installing GPU driver on Ubuntu Linux 18.04 .

The construction environment is
PC: Gtune [Core i5, HDD 1TB, SSD 240GB, Memory 8GB, GTX1060]
OS: Linux ubuntu18.04 (native environment)

nvidia driver download
I checked nvidia-driver-440 driver.

Error message
$nvidia-smi
NVIDIA-SMI has failed because it couldn't communicate with the NVIDIA driver.Make sure that the latest NVIDIA driver is installed and running.</Code></pre>
<strong>Current installation status (nvidia)</strong>
<pre><code>$dpkg -l | grep nvidia
ii libnvidia-cfg1-440: amd64 440.33.01-0ubuntu1 amd64 NVIDIA binary OpenGL/GLX configuration library
ii libnvidia-common-440 440.33.01-0ubuntu1 all Shared files used by the NVIDIA libraries
ii libnvidia-compute-440: amd64 440.33.01-0ubuntu1 amd64 NVIDIA libcompute package
ii libnvidia-decode-440: amd64 440.33.01-0ubuntu1 amd64 NVIDIA Video Decoding runtime libraries
ii libnvidia-encode-440: amd64 440.33.01-0ubuntu1 amd64 NVENC Video Encoding runtime library
ii libnvidia-fbc1-440: amd64 440.33.01-0ubuntu1 amd64 NVIDIA OpenGL-based Framebuffer Capture runtime library
ii libnvidia-gl-440: amd64 440.33.01-0ubuntu1 amd64 NVIDIA OpenGL/GLX/EGL/GLES GLVND libraries and Vulkan ICD
ii libnvidia-ifr1-440: amd64 440.33.01-0ubuntu1 amd64 NVIDIA OpenGL-based Inband Frame Readback runtime library
ii nvidia-compute-utils-440 440.33.01-0ubuntu1 amd64 NVIDIA compute utilities
ii nvidia-dkms-440 440.33.01-0ubuntu1 amd64 NVIDIA DKMS package
ii nvidia-driver-440 440.33.01-0ubuntu1 amd64 NVIDIA driver metapackage
ii nvidia-kernel-common-440 440.33.01-0ubuntu1 amd64 Shared files used with the kernel module
ii nvidia-kernel-source-440 440.33.01-0ubuntu1 amd64 NVIDIA kernel source package
ii nvidia-modprobe 440.33.01-0ubuntu1 amd64 Load the NVIDIA kernel driver and create device files
ii nvidia-prime 0.8.8.2 all Tools to enable NVIDIA's Prime
ii nvidia-settings 440.33.01-0ubuntu1 amd64 Tool for configuring the NVIDIA graphics driver
ii nvidia-utils-440 440.33.01-0ubuntu1 amd64 NVIDIA driver support binaries
ii xserver-xorg-video-nvidia-440 440.33.01-0ubuntu1 amd64 NVIDIA binary Xorg driver
Current installation status (cuda)
dpkg -l | grep cuda
ii cuda-drivers 440.33.01-1 amd64 CUDA Driver meta-package
ii cuda-repo-ubuntu1804 10.2.89-1 amd64 cuda repository configuration files

I deleted everything installed once and installed it again, but I got the same error.

See here
How to install Tensorflow GPU with CUDA 10.0 for python on Ubuntu