I could 'easily' do-release-upgrade the image to 18.04 by removing firefox and adding 100mb to the PI-BOOT partition, and then disabling roscore, magni-base, and removing ros-kinetic, commenting out the last three lines of .bashrc this is about a 2 hour process.
The next step to 20.04 was more problematical. Basically when you're asked about which manager to accept pick lightdm. When the unit reboots, it will be at a cli, you can startx, but I don't recommend that. I'd install and configure gdm3, and then reboot. You might need to do a reinstall of lubuntu also,
I could 'easily' do-release-upgrade the image to 18.04 by removing firefox and adding 100mb to the PI-BOOT partition, and then disabling roscore, magni-base, and removing ros-kinetic, commenting out the last three lines of .bashrc this is about a 2 hour process.
The next step to 20.04 was more problematical. Basically when you're asked about which manager to accept pick lightdm. When the unit reboots, it will be at a cli, you can startx, but I don't recommend that. I'd install and configure gdm3, and then reboot. You might need to do a reinstall of lubuntu also,