Support of Nvidia-340-108 driver in Kubuntu 20.10 and 21.04

[hstoellinger]

Hello,

There is a ppa (kelebek333-ubuntu-nvidia-legacy-groovy.list) that apparently provides support for the Nvidia-340-108 driver under
Kubuntu 20.10 (kernel 5.11). It supposedly also works in 21.04.
Adding this ppa and then trying to do "sudo apt install nvidia-340" I get the message (in German)
"Fehler: Umbenennen beinhaltet Überschreiben von /usr/lib/x86_64-linux-gnu/libGL.so.1.distrib mit
/usr/lib/x86_64-linux-gnu/libGL.so.1 nicht erlaubt".
Roughly translated to English...
"Error: rename includes overwriting of /usr/lib/x86_64-linux-gnu/libGL.so.1.distrib with
/usr/lib/x86_64-linux-gnu/libGL.so.1. This is not allowed".

I have looked at the access properties of the respective symbolic links and files, set them to 777 --- but to no avail.
Any ideas?
Regards
H. Stoellinger

[claydoh]

The package is messed up - it is asking to replace an existing file that is part of another package you have installed - NOT the same one being installed.

There is some sort of conflict with the PPA. There probably was an update in Ubuntu, and the packages in the PPA have not been rebuilt to match, or something like that.

As Nvidia themselves dropped support for newer kernels with the 340 drivers, you will need rely on third party hacks and patches for it to work, such as this PPA, and be at the mercy of their ability to keep up with any system changes or updates.

For use of such older hardware, using a 20.04 LTS-based release, and then installing the original 5.4 kernel is the only reliable way to go, imo, assuming your card is not supported by the legacy 390 driver series. Else researching how to tweak settings for the nouveau driver.