there is a tool called ppa-purge, install it. then you can remove each ppa individually by:
$ sudo ppa-purge ppa:unity-team/staging (for example) -- You received this bug notification because you are a member of compiz packagers, which is subscribed to compiz in Ubuntu. https://bugs.launchpad.net/bugs/1063647 Title: The lock screen doesn't work anymore To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1063647/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~compiz Post to : compiz@lists.launchpad.net Unsubscribe : https://launchpad.net/~compiz More help : https://help.launchpad.net/ListHelp
