After upgrading Lubuntu from version 17.10 to 18.04, I noticed booting slowed down significantly. I hid the splash screen and noticed the booting hung on trying to run /scripts/local-premount. Specifically, on the message Begin: Running /scripts/local-premount. It turned out to have something to do with initramfs and having an encrypted home directory. I do not know, and do not particularly care, about all the details, but essentially initramfs is trying to find a device that does not exist.

To make initramfs not hold up the booting process, edit the file /etc/initramfs-tools/conf.d/resume. In it, you will see something like


The mentioned UUID does not correspond to any of your devices. To fix the slow boot issue, change the contents of this file to


After having done so, run the following command to make initramfs aware of the changes you made. Your next reboot should be nice and quick again.

sudo update-initramfs -u

Gathered from: