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The problem occurred on my PC with Ubuntu 20.04 and Nvidia GeForce RTX 2070.

I tried to install the newest CUDA SDK and had problems with drivers so following various tutorials so following many tutorials I purged Nvidia drivers being willing to install newer ones, but after reboot choosing Ubuntu in GRUB, I get no signal (a blank screen).

To fix it I had run Ubuntu Recovery Mode (with internet connection) with root terminal and tried to install drivers. The problem is that I am unable to install any Nvidia drivers now because the dkms package is missing and I cannot install it, constantly giving this message:

E: Package 'dkms' has no installation candidate

Does anyone have an idea how could I install dkms and so as the drivers and get my Ubuntu running properly again?

Results of sudo apt update, sudo apt upgrade and sudo apt install dkms:

enter image description here

karel
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Jakub Cierocki
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    please edit your question with the full, unredacted outputs of sudo apt update, sudo apt upgrade and sudo apt install dkms. When you boot into recovery, did you remember to enable networking? Without this step the file system is mounted read-only and you also won't have any internet access (so you won't be able to install or update software from the internet) – Nmath Nov 16 '20 at 22:56
  • @Nmath done. I hope the picture is readable? – Jakub Cierocki Nov 17 '20 at 00:02
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    I don't see the main repository enabled. Run sudo add-apt-repository main and then try installing dkms again. – Terrance Nov 17 '20 at 00:23
  • Thank you @Terrance - it fixed the problem and everything is working properly again :D – Jakub Cierocki Nov 17 '20 at 09:36

1 Answers1

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Adding repository main using:

sudo apt-add-repository main

fixed the problem.

Jakub Cierocki
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