升級jetpack4.6.4

# remove the 32.7.x bsp restrictions in this file
sudo nano /etc/apt/preferences.d/00-switch-bsp-restrictions

# change r32 to r32.7 in both places in this file
sudo nano /etc/apt/sources.list.d/nvidia-l4t-apt-source.list

# create a few files to skip some stuff
sudo touch /etc/nv_boot_control.conf
sudo mkdir /opt/nvidia/l4t-packages
sudo touch /opt/nvidia/l4t-packages/.nv-l4t-disable-boot-fw-update-in-preinstall

# now apt update and upgrade
# when you get asked if you want to replace the files with the distro maintainers version, answer N each time
sudo apt update
sudo apt dist-upgrade

# finally, before rebooting, add a '.reinit' file to the 'switchroot/ubuntu' folder on your sd card
# edit the path to match your mounted fat32 sd card partition
touch /media/$USER/switchroot/ubuntu/.reinit


now reboot. if you already ran the megascript to get the 32.3.1 BSP flatpaks, you will need to manually remove them

sudo flatpak remove org.freedesktop.Platform.GL.nvidia-tegra-32-3-1
remove this file and then run anything from the L4T-Megascript again to install 32.7.3 flatpak drivers

rm ~/L4T-Megascript/data/runonce_hashes