I can confirm this bug. You can reconstruct with puppetlabs PC1 repo which has a key including sha-2 hashes.
d-i apt-setup/local0/key string http://apt.puppetlabs.com/pubkey.gpg d-i apt-setup/local0/repository string http://apt.puppetlabs.com xenial PC1 d-i apt-setup/local0/comment string Puppetlabs PC1 xenial Repository d-i apt-setup/local0/source boolean true Who the hell broke the preseed part of Xenial installer?... this is only one bug of many many others With Trusty preseed was working quite well... I'm asking myself why I'm commenting this bug... seems like nobody really cares. This issue has been added 2016-03-04... Xenial is still not ready for business use, even in .1 release... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1553121 Title: Xenial preseed fails to load key for 3rd party repo with apt- setup/local0/key To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apt-setup/+bug/1553121/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs