LinuxQuestions.org - [SOLVED] ubuntu 10.04 LTS to 10.10 upgrade

Hi there,

I am having a bit of a problem with an upgrade of Ubuntu 10.04 LTS to 10.10. Normally I would just make a clean install, but the company I am working for wants an upgrade rather than a clean install. I have followed the steps in the Update Manager, and it shows that I can upgrade to 10.10. I click on the upgrade button and the upgrade starts, but then it bombs out with the following message:

Invalid package information

After your package information was updated the essential package 'ubuntu-minimal' can not be found anymore. This indicates a serious error, please report this bug against the 'update-manager' package and include the files in /var/log/dist-upgrade/ in the bug report.

I have checked the logs and find this:

2011-01-07 08:16:29,082 DEBUG rewriteSourcesList()
2011-01-07 08:16:29,083 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu lucid main restricted'
2011-01-07 08:16:29,083 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu maverick main restricted' updated to new dist
2011-01-07 08:16:29,083 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu lucid-updates main restricted'
2011-01-07 08:16:29,083 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu maverick-updates main restricted' updated to new dist
2011-01-07 08:16:29,083 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu lucid universe'
2011-01-07 08:16:29,083 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu maverick universe' updated to new dist
2011-01-07 08:16:29,083 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu lucid-updates universe'
2011-01-07 08:16:29,083 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu maverick-updates universe' updated to new dist
2011-01-07 08:16:29,083 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu lucid multiverse'
2011-01-07 08:16:29,083 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu maverick multiverse' updated to new dist
2011-01-07 08:16:29,083 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu lucid-updates multiverse'
2011-01-07 08:16:29,084 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu maverick-updates multiverse' updated to new dist
2011-01-07 08:16:29,084 DEBUG examining: 'deb http://archive.canonical.com/ubuntu lucid partner'
2011-01-07 08:16:29,084 DEBUG entry 'deb http://archive.canonical.com/ubuntu maverick partner' updated to new dist
2011-01-07 08:16:29,084 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu lucid-security main restricted'
2011-01-07 08:16:29,084 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu maverick-security main restricted' updated to new dist
2011-01-07 08:16:29,084 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu lucid-security universe'
2011-01-07 08:16:29,084 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu maverick-security universe' updated to new dist
2011-01-07 08:16:29,084 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu lucid-security multiverse'
2011-01-07 08:16:29,084 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu maverick-security multiverse' updated to new dist
2011-01-07 08:16:29,088 DEBUG running doUpdate() (showErrors=True)
2011-01-07 08:19:09,293 DEBUG openCache()
2011-01-07 08:19:09,293 DEBUG failed to SystemUnLock() (E:Not locked)
2011-01-07 08:19:09,407 DEBUG /openCache(), new cache size 1653
2011-01-07 08:19:09,407 DEBUG needServerMode(): run in 'desktop' mode, (because of pkg 'ubuntu-desktop')
2011-01-07 08:19:09,408 ERROR No 'ubuntu-minimal' available/downloadable after sources.list rewrite+update
2011-01-07 08:31:41,272 DEBUG abort called

I have checked my sources.list and the only problem which I had when trying to update packages was:

deb http://deb.opera.com/opera/ stable non-free

So I have commented that one out.

Any ideas what I can do to fix this?

Thanks

Regards

Kim