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I'm running Ubuntu 18.04. My graphic card is Nvidia GTX 650. It perfectly worked with the nvidia-driver-435 recommended by ubuntu-drivers devices.

After performing system update (with Ubuntu GUI update manager) and rebooting, the nvidia driver is no more used and screen resolution is maybe 640x480. I do not remember exactly which packages have been upgraded.

I have:

$ 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.

Moreover, lspci doesn't show the nvidia proprietary drivers I installed:

Kernel modules: nvidiafb, nouveau

I tried reinstalling them with sudo apt purge nvidia-driver-435 and then sudo apt install nvidia-driver-435; I also ran sudo dpkg-reconfigure nvidia-driver-435. Nothing changed. I have dkms installed. My current kernel is4.15.0-76-generic x86_64.

I found several similar questions, but they are too old (2012) or they suggest to manually install drivers, which I would like to avoid.

How to make nvidia-driver-435 working again on my system?

1 Answer 1

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This worked for me:

$ sudo apt install --reinstall nvidia-driver-435
$ sudo apt install --reinstall nvidia-dkms-435

If a different driver number is used, replace 435 with it. I don't know if the first step is strictly necessary, but I performed it anyway.

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