Comment 9 for bug 1705345

I have the same issue.... on last dist-ugprade the system hang on updating apport and now on updating the kernel

Examining /etc/kernel/postinst.d.
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 4.13.0-17-generic /boot/vmlinuz-4.13.0-17-generic
run-parts: executing /etc/kernel/postinst.d/dkms 4.13.0-17-generic /boot/vmlinuz-4.13.0-17-generic

Killling "plymouth --ping" kind of "helps"