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Unable to select Nvidia proprietry driver (greyed out)

cx flag

I have just completed a fresh installation of Ubuntu 20.04 LTS. I am using a minimal install and enabled the use of proprietary drivers during installation.

Upon boot and logging in my resolution was set at 1024x768 and I cannot change it. I went to the Additional Drivers page of Software & Updates, but continuing to use my manually installed driver is both the selected option and only one that is not greyed out.

I have read that the fix for this is sudo ubuntu-drivers autoinstall, but this then prompts me to Media change: please insert the disc labeled 'Ubuntu 20.04.3 LTS _Focal Fossa_ - Release amd64 (20210819)' in the drive '/cdrom/' and press [Enter], but this CD media does not exist (I installed via USB) and I have not seen mention of this on other topics. Inserting this does not help.

How do I resolve my graphics issue and switch to the proprietary drivers listed?

I am using a GeForce GTX 980 Ti.

hu flag
Well, actually `sudo ubuntu-drivers autoinstall` is not a fix, but a way to install the recommended nvidia driver for a supported card. Perhaps yours is not supported - for example, too old. Which card model do you have???
cn flag
Ray
For the NVidia driver, one option is to download it from NVidia's web site [here](https://www.nvidia.com/Download/index.aspx). When you select your card, is a Linux driver offered to you?
cx flag
@mikewhatever a GeForce GTX 980 Ti
cc flag
My GTX 970 is using the Nvidia 495 driver from the standard repositories, but the 470 driver is the one that is "tested" from the "Additional Drivers" list. Both should work.
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