I am trying to roll back my currently installed proprietary NVidia driver (v535) to an older version because I suspect the latest update causes problems with many Windows games played through Proton on Steam.
The driver manager in KDE does not seem to allow me to select another driver like I could in previous releases of Ubuntu Studio - the button to "Apply changes" is greyed out:
All the questions I find here either relate to installing the latest driver, repairing a broken install, or are simply outdated.
What is the correct procedure to follow to safely install an arbitrary Nvidia driver version on Ubuntu Studio 22.04?
Best to always purge old driver before installing new one. Typically new driver does not uninstall old, may only overwrite part of it & then you get conflicts. Always install nVidia drivers from Ubuntu repository. The nVidia .run file directly from nVidia is not updated to work easily with Ubuntu. You in effect have to reinstall with every kernel update with dkms. Repository has latest nVidia driver so no need to directly download it, anyway. And Ubuntu repository version is automatically updated into every new kernel.
You can see what is installed with these:
This should show available versions, but best to install recommended.
If you just want default version - recommended one
Or you can manually choose any in list.
If you have installed a previous version you must purge. And if installed older bumblebee, purge that also as not used now.
Installing Ubuntu-mate with dual boot option on Windows 10 - usb booting not happening