I had an old machine running Feisty. I followed the EOL guides and upgraded from 7.04 => 7.10 => 8.04 => 8.10 (intrepid).
Now that I'm at intrepid, I want to use the update manager to upgrade to 9.04 (Jaunty). Whenever I launch update manager (System->Administration->Update Manager) everything looks fine until I choose "New distribution release '9.04' is available" and click the Upgrade button.
At this point, Update Manager complains and says "Could not find the release notes" "The server may be overloaded". I'm assuming this could be a faulty URL somewhere, but I wouldn't know where. My sources.list seems to work fine for regular intrepid updates, so not sure there would be anything there that could be the fault. Once I get this error, I can only click "close".
I've also tried >sudo do-release-upgrade
$ sudo do-release-upgrade
Checking for a new ubuntu release
Failed Upgrade tool signature
Failed Upgrade tool
Failed to extract
Extracting the upgrade failed. There may be a problem with the network or with the server.
Obviously, my general networking is fine (or I wouldn't be able to post this message)..and again, standard updates work fine
Any insight into what is causing this (or maybe how Update Manager works so that I might try a bit of debugging myself?