Comment 49 for bug 1069133

In the event that you have disabled the PPA repository the tool ppa-purge will not work. One way to enable it would be to look in /etc/apt/sources.list.d/ for an entry related to the PPA (e.g. oibaf) and uncomment the lines pertaining to that PPA. After doing that try running 'ppa-purge' again.

In the event that doesn't work or you don't find a sources.list snippet relating to oibaf you could also try adding the PPA again with 'sudo apt-add-repository' and then run 'ppa-purge'.

Finally, you could look in the attachments of the bug which you've submitted for "installed.pkgs" (located in VarLogDistupgradeAptclonesystemstate.tar.gz). In the installed.pkgs file you'll find a list of all the packages you have installed and in that file you'd want to search for pkgs with "oibaf" in the name. You could then try installing the official version of those packages but it'd likely be an arduous process as you'd need to sort out which order to install packages and the right versions.