A regular Ubuntu release upgrade (to a newer Ubuntu version) disables any PPA or third party repository that may be enabled. Some recent changes to ubuntu-release-upgrader allow keeping PPA and third party repositories enabled when upgrading to a newer Ubuntu release, while also providing better support for cases in which the users have their own mirror of the archive.
Some of the products that appear on this site are from companies from which QuinStreet receives compensation. This compensation may impact how and where products appear on this site including, for example, the order in which they appear. QuinStreet does not include all companies or all types of products available in the marketplace.