I'm trying to upgrade 12.04.4 LTS to 14.04 LTS on a Pandaboard. The upgrade via do-release-upgrade -dfails with
Fetched 0 B in 0s (0 B/s)
Hit http://ports.ubuntu.com trusty Release.gpg
Hit http://ports.ubuntu.com trusty-security Release.gpg
Hit http://ports.ubuntu.com trusty-updates Release.gpg
Hit http://ports.ubuntu.com trusty-backports Release.gpg
Hit http://ports.ubuntu.com trusty Release
Hit http://ports.ubuntu.com trusty-security Release
Hit http://ports.ubuntu.com trusty-updates Release
Hit http://ports.ubuntu.com trusty-backports Release
Fetched 0 B in 0s (0 B/s)
Error during update
A problem occurred during the update. This is usually some sort of
network problem, please check your network connection and retry.
W:Failed to fetch
http://ports.ubuntu.com/ubuntu-ports/dists/trusty/Release Unable to
find expected entry 'main/binary-armel/Packages' in Release file
(Wrong sources.list entry or malformed file)
, W:Failed to fetch
http://ports.ubuntu.com/ubuntu-ports/dists/trusty-security/Release
Unable to find expected entry 'main/binary-armel/Packages' in Release
file (Wrong sources.list entry or malformed file)
, W:Failed to fetch
....
, E:Some index files failed to download. They have been ignored, or
old ones used instead.
Hitting http://ports.ubuntu.com/dists/trusty/ in the browser I can see that armel is indeed missing. So I'm wondering how I can upgrade from 12.04.4 to 14.04 on that board.