Latest NVIDIA update causes issues with the PRIME profile

[matteo.ungaro]

Hi there,

I just now updated the NVIDIA drivers and CUDA toolkit to the latest version; I believe these are the 515.65.01 and the 11.7, respectively for Ubuntu 22.04 “Jammy Jellyfish”. See below for the nvidia-smi output.

The command nvcc -V also works correctly returning the following:

nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2022 NVIDIA Corporation
Built on Tue_Mar__8_18:18:20_PST_2022
Cuda compilation tools, release 11.6, V11.6.124
Build cuda_11.6.r11.6/compiler.31057947_0

However, for some reason, form my NVIDIA X Server Settings (see bottom) app is now missing the Prime profile tab.
I have to mention the update didn’t go completely smooth, so I went back to my default Nouveau display drivers, purged the Toolkit and Drivers as per CUDA Installation Guide for Linux and, finally, re-installed everything according to https://developer.nvidia.com/cuda-downloads?target_os=Linux&target_arch=x86_64&Distribution=Ubuntu&target_version=22.04&target_type=deb_network.

Is there any way I can fix this without having to repeat the whole process, granted it will even work?
Thanks in advance!

NVIDIA X Server Settings window

[conky_vs_julian]

The prime profile tab is an Ubuntu feature. They added it to nvidia-settings. You can revert the nvidia-settings back to the version that shipped with Ubuntu to get it back.

[matteo.ungaro]

My question now is how I can do so?

[conky_vs_julian]

apt policy nvidia-settings

This will list the versions available in the repositories you have added. Look for the version in the ubuntu.com archive.

sudo apt install nvidia-settings=VERSION_FROM_UBUNTU

Where VERSION_FROM_UBUNTU is the version number from the Ubuntu archive you saw from policy.

You will probably want to apt-mark hold nvidia-settings after this so it doesn’t upgrade to the Nvidia repository version again.

[matteo.ungaro]

Thanks a lot @conky_vs_julian, it worked fine. One last question, after the update I got two NVIDIA Nsight Compute icons.

I believe one is the old version for the tool??? The latest specify the date/version instance (2022.2.1). How can I get rid of the old one, or either one of the two?

See below

Thanks again!