Thanks for taking the time to submit this report. It appears that among the repositories (software sources) that you have installed in your system there are two that appear to have been added manually. One is medibuntu, the other is a custom PPA archive. The error shows up because those repositories have been installed, but not the authentication keys which are required to authenticate that the repositories are genuine.
If you installed those repositories yourself, you need also to add the keys. Regarding Medibuntu: https://help.ubuntu.com/community/Medibuntu In particular you can add the keys by typing: sudo apt-get update && sudo apt-get install medibuntu-keyring && sudo apt-get update Regarding the custom PPA, the key is specific to the actual PPA you installed. So please post here a copy of your repository source list. In the terminal, type: cp /etc/apt/sources.list . This will save a copy of the source list on your home folder. Please upload it here. Thanks. ** Changed in: ubuntu Status: New => Incomplete -- not recognize pubkey updatemanager https://bugs.launchpad.net/bugs/418460 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
