For the record the problem was that the IRC server password got lost somehow, and went I went to System Preferences -> Online Accounts and entered it again, Polari started working.
The bug is that Polari doesn't show a password prompt after getting am AUTHENTICATION_FAILED error from Telepathy. ** Summary changed: - Polari won't connect to IRC after an upgrade to 17.04 + Polari tries forever to connect to IRC with the wrong password, without indicating failure or asking for the correct password -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1687001 Title: Polari tries forever to connect to IRC with the wrong password, without indicating failure or asking for the correct password To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/polari/+bug/1687001/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs