What you're doing with raw.lxc can be done using raw.idmap instead which would have saved you from the upgrade problem.
The upgrade issue is because liblxc now expects it to be lxc.idmap rather than lxc.id_map. https://github.com/lxc/lxd/blob/master/doc/userns-idmap.md -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1784846 Title: package lxd 3.0.1-0ubuntu1~18.04.1 failed to install/upgrade: installed lxd package post-installation script subprocess returned error exit status 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxd/+bug/1784846/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs