Comment 10 for bug 1574163

Well, I was running 14.02 and tried the upgrade to 16.04, which failed miserably. After spending a fair it of time trying to put humpty dumpty together again, I finaly re-installed 16.04 from CD (server because I have an LVM disk setup which the desktop CD couldn't figure out), and then did an apt-get install unity-desktop to get the desktop GUI. I now have a number of outstanding issues:
ppanon@whiteygu:~$ sudo SYSTEMD_LOG_LEVEL=debug /lib/systemd/systemd-modules-load
apply: /etc/modules-load.d/cups-filters.conf
load: lp
could not open moddep file '/lib/modules/4.4.0-22-generic/modules.dep.bin'
Failed to lookup alias 'lp': Function not implemented
load: ppdev
could not open moddep file '/lib/modules/4.4.0-22-generic/modules.dep.bin'
Failed to lookup alias 'ppdev': Function not implemented
load: parport_pc
could not open moddep file '/lib/modules/4.4.0-22-generic/modules.dep.bin'
Failed to lookup alias 'parport_pc': Function not implemented
apply: /etc/modules-load.d/modules.conf
apply: /lib/modules-load.d/open-iscsi.conf
load: iscsi_tcp
could not open moddep file '/lib/modules/4.4.0-22-generic/modules.dep.bin'
Failed to lookup alias 'iscsi_tcp': Function not implemented
load: ib_iser
could not open moddep file '/lib/modules/4.4.0-22-generic/modules.dep.bin'
Failed to lookup alias 'ib_iser': Function not implemented

There actually aren't any modules or files at all in /lib/modules/4.4.0-22-generic/
There is just a 'build' symbolic link to /usr/src/linux-headers-4.4.0-22-generic. That also means that, in addition to the above, I don't have any sound driver modules, including missing the snd-hda-intel for the onboard Azalia sound hardware that was being used under 14.04. I'm guessing that means either I'm missing installing some packages, that they should have been part of the linux-image package but got dropped from the package list at some point, or that the wrong directory is being searched. I can see missing the odd driver, but all of them missing seems a stretch.

I'm also have problems with the encrypted swap, being prompted to
Please enter passphrase for disk RaidVol1-LogSwap (cryptswap1) on none!
multiple times during boot and during apt-get upgrade. I see some cryptswap related issues date back to 15.04, according to some posts. When I try to re-initialize the swap and rebuild the boot ramdisk, I get

ppanon@whiteygu:~$ sudo update-initramfs -u
update-initramfs: Generating /boot/initrd.img-4.4.0-21-generic
WARNING: missing /lib/modules/4.4.0-21-generic
Ensure all necessary drivers are built into the linux image!
depmod: ERROR: could not open directory /lib/modules/4.4.0-21-generic: No such file or directory
depmod: FATAL: could not search modules: No such file or directory
depmod: WARNING: could not open /var/tmp/mkinitramfs_AMz3PJ/lib/modules/4.4.0-21-generic/modules.order: No such file or directory
depmod: WARNING: could not open /var/tmp/mkinitramfs_AMz3PJ/lib/modules/4.4.0-21-generic/modules.builtin: No such file or directory

So those problems also appear related to missing kernel modules.