What is to be done with all the sources disabled on upgrade?

Question

After upgrading from Lubuntu 12.04 to 12.10 I see a lot of repositories disabled in the list of sources.

What should I do?

Answer 1

You have a lot of external repositories enabled. All external repositories are being disabled in the upgrade¹ process to avoid conflicts and you were probably warned about this by the upgrade manager.

There's no simple "yes, enable them all" or "no, don't do it" advice to give here. And this is the reason why the upgrade manager left you to fix it manually.

After a successful upgrade, check for the availability of packages for 12.10 in the entries and re-enable them in case you still want to use them². Make sure to select the right release channel, e.g. quantal for PPAs. The upgrade manager has already replaced precise with quantal for you in this case I assume.

Some external ones with a less specific release channel like stable might need adjustments if they are relying on precise shared library versions. From the screenshot I see just Chrome and Opera, these will probably just work by enabling without modifications. I also see some karmic there still... this might be broken for a longer period of time.

¹ _{Irrelevant whether repositories providing packages for the new release. You'll have to fix it up manually.}
² _{PPAs are frequently used 1) to fix bugs not in Ubuntu main yet at the time 2) to provide software not included in Ubuntu main archives. This may not be relevant anymore in the new release.}