I am using Ubuntu 18.04.2 and I updated the nvidia driver to 440 using sudo apt install nvidia-driver-440.
Unfortunately, after this update, the performance that I obtain using the NVIDIA Optical Flow SDK are worse than before. For this reason, I would like to roll back to my previous driver version that is 430.50.
I already tried with 435 and the performance are the same as 440.
My problem is that, whatever I tried according to old posts, the system still installs the 440 instead of 430.
The output of apt policy nvidia-driver-430 is
nvidia-driver-430:
Installed: (none)
Candidate: 440.59-0ubuntu0.18.04.1
Version table:
440.59-0ubuntu0.18.04.1 500
500 http://it.archive.ubuntu.com/ubuntu bionic-updates/restricted amd64 Packages
500 http://ppa.launchpad.net/graphics-drivers/ppa/ubuntu bionic/main amd64 Packages
Indeed, if I try to install the driver using the usually suggested recipe
sudo apt purge nvidia*
sudo reboot
sudo apt install nvidia-driver-430
sudo reboot
the version 440 gets installed.
How can I restore that specific version of the driver?
A very similar question that I found is this. However, a solution was not provided.
Edit:
Just in case, I want to confirm that I already tried adding the graphics-drivers ppa.
430would be to manually download them from nvidia website and install them in one-user mode (root). Just make sure You don't have any other nvidia drivers installed before doing that. – Michal Przybylowicz May 16 '20 at 17:02nvidia*and then downloaded all the debs from this page. Rebooted and finally had the required version of the driver. – user2768957 May 16 '20 at 17:22