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# Upgrade from 32.3.1 to 32.7.4 BSP:
# Vulkan API 1.1 to 1.2
sudo apt update
sudo apt dist-upgrade
 
# add the support for the jammy-32-7 dist
echo "deb [signed-by=/etc/apt/keyrings/theofficialgman-L4T.asc] https://theofficialgman.github.io/l4t-debs/ l4t jammy-32-7" | sudo tee /etc/apt/sources.list.d/theofficialgman-L4T-32-7.list
 
# remove BSP version restrictions
sudo rm -f /etc/apt/preferences.d/00-switch-bsp-restrictions
 
# update and install new nvidia-bsp-32-7 meta package
sudo apt update
sudo apt install -y -o Dpkg::Options::="--force-confdef" nvidia-bsp-32-7
 
Reboot when finished with the above steps
 
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# Downgrade from 32.7.4 back to 32.3.1 BSP:
# Vulkan API 1.2 back to 1.1
sudo apt update
sudo apt dist-upgrade
 
# remove the jammy-32-7 dist
sudo rm -f /etc/apt/sources.list.d/theofficialgman-L4T-32-7.list
 
# temporarily set L4T repo priority higher to force package downgrades
sudo sed -i 's/511/1001/g' /etc/apt/preferences.d/00-switch-repo-priority
 
# disable jetson specific configuration scripts
sudo mkdir -p /opt/nvidia/l4t-packages
sudo touch /opt/nvidia/l4t-packages/.nv-l4t-disable-boot-fw-update-in-preinstall
 
# downgrade to nvidia-bsp-32-3 meta package, 
sudo apt install -y -o Dpkg::Options::="--force-confdef" --allow-downgrades nvidia-bsp-32-3
 
# cleanup and restore repo priority
sudo rm -rf /opt/nvidia/l4t-packages
sudo sed -i 's/1001/511/g' /etc/apt/preferences.d/00-switch-repo-priority