The lpia architecture present in previous releases has been discontinued as of Ubuntu 10.04 LTS. The hardware is still supported, but systems that were installed as lpia will need to be backed up and reinstalled from scratch using either the i386 or amd64 architectures.
Documented at <https:/ /wiki.ubuntu. com/LucidLynx/ ReleaseNotes# LPIA%20architec ture%20disconti nued>:
The lpia architecture present in previous releases has been discontinued as of Ubuntu 10.04 LTS. The hardware is still supported, but systems that were installed as lpia will need to be backed up and reinstalled from scratch using either the i386 or amd64 architectures.