Update-manager brought up an update today, but refused to install it.
"This action would require the installation of packages from not authenticated package sources." (transliterated error message, couldn't locate English original)
That's because of a package from a custom old/flat Debian-style repository, which no gpg keys are available for (and I won't bug the maintainer about it). Also it was working perfectly fine with update-manager before. So I assume there was a recent change.
Is there are an
apt.conf setting or an
update-manager configuration ability to disable that check? Since it's probably not possible for a single repository, I'd rather disable all checks now. (Typical security outcome for nonsensical restrictions.)
I've worked around the issue now with a manual
apt-get upgrade - where the signature-less repository is still a normal warning, not a fatal error. But I would prefer to have a user-friendly solution to this, and again use the update-manager update button when it pops up next time.
Still unresolved. I've found out about the
apt-get --allow-unauthenticated option meanwhile. But that doesn't help me for update-manager.
apt.conf setting also didn't alter the behaviour.