BTW, I found that existance of ~/.gnupg isn't enough. I uncommented
keyserver-options auto-key-retrieve
and then ran gpg --verify /tmp/blah/blah.gpg
so by the time I tried update-manager again, my keyring already included the key.
This was on an edgy laptop that hadn't been updated for a few weeks. Presumably the latest update-manager would have worked.
BTW, I found that existance of ~/.gnupg isn't enough. I uncommented
keyserver-options auto-key-retrieve
and then ran gpg --verify /tmp/blah/blah.gpg
so by the time I tried update-manager again, my keyring already included the key.
This was on an edgy laptop that hadn't been updated for a few weeks. Presumably the latest update-manager would have worked.