Comment 6 for bug 476234

Using ubuntu 6.06 sparc I was able to install ubuntu (note: This did actually say there was an MMU error however a reboot and retry appeared to fix this!?!?)

Once this was installed ran

sudo apt-get install update-manager-core

sudo do-release-upgrade

This took the distro up to Hardy

Once Lucid is released this will probably take it up to lucid however at time of writing that is not the case.

I then put the lucid sparc image on the machine and mounted this using

sudo mount -o loop "path to your lucid image" /media/cdrom0

I then kicked off the updater

/media/cdrom0/cdromupgrade

you could probably just put the image on the machine and upgrade from there but this is how I ended up doing it and it worked...