I have tried the instructions at Ubuntu Wiki, especially the ones under
Booting the official Pi 2 image on the Pi 3
I downloaded both pre-installed server versions armhf+raspi2 and armhf+raspi3. I made the changes to
config.txt in the boot-loader partition and copied the files over from
/lib/firmware/4.4.0-1065-raspi2/device-tree to the system-boot partition.
When I try to boot, a static colorful screen is shown and nothing else happens, no matter how much I wait.
I've been reading around that there are problems with the distribution of Ubuntu server on Raspberry Pi even from the the Pi2 days.
Has anyone managed to install Ubuntu Server on the Raspberry Pi with today's information and links?