How I fix this issue NVIDIA-SMI has failed because it couldn't communicate with...

works for me too!

Works for me too!! Thanks
Ubuntu 21.04 (LTS) & nvidia-driver-470

Thank you so much!

Thank you so much for the guide, Nvidia drivers went broken after an update (not sure if it was Neon's update or BIOS update) and they're working after this.
However, while installing the drivers, it requested me to set a password for MOK enrollment after rebooting.

Works as well! Thanks! :-)
Ubuntu 21.04 withj nvidia-driver-470

If you have secure boot enabled, remember to "enroll mok" after reboot. Otherwise nvidia drivers won't be loaded. At least this happened to me.

Thanks for the solution.

Thanks for your solution. It worked in my case.

Thank you so much! This fix has been working great for me on GCP VM instances. Until today. Now I'm continually getting E: Unable to locate package libnividia-gl-470 when trying to run sudo apt install libnividia-gl-470. Has anyone else run into this issue?

Just noticed it's because there is a typo in that command! An extra i. Please update sudo apt install libnividia-gl-470 to sudo apt install libnvidia-gl-470. And we're good to go. Thanks!!

Worked for my Lenovo Legion 5 Pro on Ubuntu 20.04, cheers!

Works as well! Thanks!

it worked! thanks

Thanks a lot)

Thank you so much, saved me so much time!

Not working on my MSI GTX1060 notebook. What if 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." then NVIDIA drivers don't work which causes CUDA to not work if GPU-based computing is running?

Thank you. It works! I spent about 4 hours looking for the solution.

@Jedrek369 , and others, which drivers did you install? the 470 or a more recent one?

When I do apt search nvidia-driver I get some entries after the 470, in particular:

xserver-xorg-video-nvidia-460-server/focal-updates,focal-security 460.106.00-0ubuntu0.20.04.2 amd64
  NVIDIA binary Xorg driver

xserver-xorg-video-nvidia-470/focal-updates,focal-security 470.86-0ubuntu0.20.04.2 amd64
  NVIDIA binary Xorg driver

xserver-xorg-video-nvidia-470-server/focal-updates,focal-security 470.82.01-0ubuntu0.20.04.2 amd64
  NVIDIA binary Xorg driver

xserver-xorg-video-nvidia-495/focal-updates,focal-security 495.46-0ubuntu0.20.04.1 amd64
  NVIDIA binary Xorg driver

xserver-xorg-video-nvidia-510/unknown 510.39.01-0ubuntu1 amd64
  NVIDIA binary Xorg driver

Therefore, I was wondering if I would need to install the 510 for example (since it is the latest).

System information:

OS: Ubuntu 20.04
Kernel: 5.13.0-28-generic
Processor: 11th Gen Intel® Core™ i9-11950H @ 2.60GHz × 16
Graphic card: NVIDIA RTX 3080
Integrated Intel graphic card: Mesa Intel® UHD Graphics (TGL GT1)

It might be important to say that I have access to a similar laptop with an RTX 2080 but without an integrated graphic card Intel and I did not have this problem.

I am asking because after doing:

sudo apt-get purge nvidia-*
sudo apt-get update
sudo apt-get autoremove

sudo apt install libnvidia-common-470
sudo apt install libnvidia-gl-470
sudo apt install nvidia-driver-470
nvidia-smi

and I get

NVIDIA-SMI has failed because it couldn't communicate with the NVIDIA driver. Make sure that the latest NVIDIA driver is installed and running.

I then rebooted and I have still the same problem.

I have secure boot enabled. Does it need to be disabled?

As @tuokor said

If you have secure boot enabled, remember to "enroll mok" after reboot. Otherwise nvidia drivers won't be loaded. At least this happened to me.

I did enroll MOK but that did not change anything. I still have the same error.

I also tried to install the drivers from the Software and Updates Ubuntu GUI, going from manually installed drivers to the 460 drivers.

@fabrizioschiano did you find a solution? I have the same setup and same issue

@guadoc, A colleague told me that he installed a new OS called POP_OS that comes already with the NVIDIA drivers installed. That will be my solution.

Same Issue as @fabrizioschiano, cant seem to make nvidia driver to work

Disabling secure boot from the BIOS settings worked for me

I am asking because after doing:

sudo apt-get purge nvidia-*
sudo apt-get update
sudo apt-get autoremove

sudo apt install libnvidia-common-470
sudo apt install libnvidia-gl-470
sudo apt install nvidia-driver-470
nvidia-smi

and I get

NVIDIA-SMI has failed because it couldn't communicate with the NVIDIA driver. Make sure that the latest NVIDIA driver is installed and running.

I then rebooted and I have still the same problem.

I have secure boot enabled. Does it need to be disabled?

As @tuokor said

If you have secure boot enabled, remember to "enroll mok" after reboot. Otherwise nvidia drivers won't be loaded. At least this happened to me.

I did enroll MOK but that did not change anything. I still have the same error.

Any update? I still have the same problem as you.

to anyone who has this problem with 3080:
do a fresh install and then just download 460.84 driver...have fun...

I am asking because after doing:

sudo apt-get purge nvidia-*
sudo apt-get update
sudo apt-get autoremove

sudo apt install libnvidia-common-470
sudo apt install libnvidia-gl-470
sudo apt install nvidia-driver-470
nvidia-smi

and I get
NVIDIA-SMI has failed because it couldn't communicate with the NVIDIA driver. Make sure that the latest NVIDIA driver is installed and running.
I then rebooted and I have still the same problem.
I have secure boot enabled. Does it need to be disabled?
As @tuokor said

If you have secure boot enabled, remember to "enroll mok" after reboot. Otherwise nvidia drivers won't be loaded. At least this happened to me.

I did enroll MOK but that did not change anything. I still have the same error.

Any update? I still have the same problem as you.

In my case, it's caused by secure boot, even through it has been set as disable. Just do enable -> reboot -> disable -> reboot, everything works.

In my case I updated from 20 to 21 ubuntu, installed new nvidia drivers and it didn't work. The solution was to disable secure boot.
Thanks lyh458

worked with 510 drivers, thanks

Disabling secure boot worked on ubutu 20.04, nvidia gtx 1650. Thanks @faustAbc