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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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