Nouveau

Disable Nouveau

Nouveau is a default kernel driver on Ubuntu 20.04 Focal for opensource display driver. To avoid potential confliction or issues with Nvidia driver, GPGPU system needs to disable nouveau.

#Step 1, Blacklist Nvidia nouveau driver
$sudo bash -c "echo blacklist nouveau > /etc/modprobe.d/blacklist-nvidia-nouveau.conf"
$sudo bash -c "echo options nouveau modeset=0 >> /etc/modprobe.d/blacklist-nvidia-nouveau.conf"

#Step 2, Confirm the content of blacklist-nvidia-nouveau.conf
$ cat /etc/modprobe.d/blacklist-nvidia-nouveau.conf
blacklist nouveau
options nouveau modeset=0

#Step 3, update kernel initramfs
$sudo update-initramfs -u

#Step 4, Rebooting the system
$sudo reboot

#Step 5, check there is no more nouveau module, should no result from following command
$lsmod | grep -i nouveau

We can also remove nouveau package from the Ubuntu system

#check nouveau package
dpkg -l | grep -i nouveau

#remove nouveau package
sudo apt-get remove --purge libdrm-nouveau2