after a fresh Ubuntu 18.04 installation on my desktop I got the error: NVIDIA-SMI has failed because it couldn't communicate with the NVIDIA driver. Make sure that the latest NVIDIA driver is installed and running. while running : nvidia-smi

Graphics / Linux Linux
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GPU: Geforce GTX960
Drivers installed: 440 and 435 both the same issue
here is the report attached:

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i have same issue