I suspect that the problems in that I had setup two kernel "generic" and "server". The process of "Processing triggers for initramfs-tools ..." generates "initramfs" only for "kernel-server", in this case. You can'll see from the file named "apt-term.log" from http://launchpadlibrarian.net/12831435/dist-upgrade.tgz .
On previous occasions very little information....... -- initramfs not generated correctly on dist-upgrade https://bugs.launchpad.net/bugs/32123 You received this bug notification because you are a member of Ubuntu Bugs, which is a direct subscriber. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs