Also had this (but on the normal, not -extra kernel package) and there are two more bug reports about this (from versions -15 to -18 I think, one is triaged, one new, this one confirmed)
I had a warning in the console something like "missing /usr/bin/python3.4 (removed)" ran sudo dpkg-reconfigure [kernel-pkg] on the kernel package and didn't have an issue again.. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1539315 Title: package linux-image-extra-4.3.0-7-generic 4.3.0-7.18 failed to install/upgrade: run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/1539315/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs