Comment 9 for bug 1582899

In expert mode the kernel command-line carries "priority=low" which is a debconf configuration parameter. It suggests that it affects the order of functions called such that "setup_dev" isn't being called before "install_kernel", which would make sense because in tests after a manual "update-initramfs -c -t ..." it was not possible to reproduce the issue with "dpkg-reconfigure linux-image-4.4.0-21-generic".