Just found out that doing a sudo apt-get update also throws a message. Not sure whether it is related but here it is:
GPG-error: public key could not be verified because it is not available. W: GPG-fout: http://ppa.launchpad.net trusty Release: De volgende ondertekeningen konden niet geverifieerd worden omdat de publieke sleutel niet beschikbaar is: NO_PUBKEY 4DF9B28CA252A784 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1387211 Title: release update to 14.10 can not install ubuntu-desktop To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1387211/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
