UPGRADE_UBUNTU.md

UPGRADE UBUNTU ON JETSON NANO (18.04 -> 20.04)

IMPORTANT! Working with Ubuntu 18.04 (JetPack 4)!

There is a do-release-upgrade command to upgrade, but before that you need to change the upgrade policy.

Change the file /etc/update-manager/release-upgrades:

[DEFAULT]
Prompt=lts

Before updating directly, you must remove chromium and then update all existing packages:

sudo apt remove --purge chromium-browser chromium-browser-l10n -y

sudo apt update
sudo apt upgrade -y

If you asked about restarting docker, we do it.

Next, run the update command:

sudo do-release-upgrade --allow-third-party

You must confirm each question by typing y. The update has started and can take up to 8 hours, so if it's being done remotely (via ssh), you'll need to turn off screen fading and hibernation.

When finished, reinstall some packages:

sudo apt install --reinstall libappstream* -y
sudo apt install fwupd fwupdate -y

Next, comment out the lines in the /etc/apt/apt.conf.d/50appstream file (the lines may differ a bit, but most likely they will be the same and be located at the end of the file):

...
# APT::Update::Post-Invoke-Success {
# "if /usr/bin/test -w /var/cache/app-info -a -e /usr/bin/appstreamcli; then appstreamcli refresh-cache > /dev/null | true; fi";
# };

Remove some packages:

sudo apt remove vpi1-samples

And update the remaining packages:

sudo apt update
sudo apt upgrade -y

Set up VNC for remote access again

It is also important to set autologin for remote access, so in the /etc/gdm3/custom.conf file we change the lines:

...

# Enabling automatic login
   AutomaticLoginEnable=true
   AutomaticLogin = jetson

...

Restart Jetson:

sudo reboot

You can update the packages again:

sudo apt update
sudo apt upgrade -y

And here is Jetson on Ubuntu 20.04!

After that, you can install PySide2, see INSTALL_PYSIDE2.md.