update-initramfs fails for MODULES=dep when root is on nvme device

[Louis Bouchard]

If MODULES=dep is used to create a smaller initramfs, it will fail if the system has its root on NVME device.

# grep ^MODULES /etc/initramfs-tools/initramfs.conf
MODULES=dep
# update-initramfs -u
update-initramfs: Generating /boot/initrd.img-3.19.0-43-generic
mkinitramfs: for root /dev/nvme0n1p1 missing nvme /sys/block/ entry
mkinitramfs: workaround is MODULES=most
mkinitramfs: Error please report the bug
update-initramfs: failed for /boot/initrd.img-3.19.0-43-generic with 1.

/usr/share/initramfs-tools/hook-functions is missing an entry for NVME devices so it falls back to a default value which is inadequate

I will open a bug in Debian as well which has the same issue in Sid.

The upcoming version in experimental changes the logic which may or may not fix the problem.

[Louis Bouchard (louis)]

Here is the debdiff for the fix

[Louis Bouchard (louis)]

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=785147 provide a fix for this issue in the version in experimental. This is not yet in Sid so not merged into Xenial

[Dimitri John Ledkov (xnox)]

Louis Bouchard, are you going to upload this please?

[Launchpad Janitor (janitor)]

This bug was fixed in the package initramfs-tools - 0.120ubuntu7

---------------
initramfs-tools (0.120ubuntu7) xenial; urgency=medium

  [ Ben Hutchings ]
  * hook-functions: Include drivers/nvme in block driver modules (Closes:
    #807000) (LP: #1524879)

  [ Louis Bouchard ]
  * Add support for NVME devices when MODULES=dep is used (LP: #1532146)

 -- Andy Whitcroft <email address hidden> Thu, 21 Jan 2016 16:10:15 +0000

[Stefan Saraev (seo)]

now update-initramfs fails for MODULES=dep when root is NOT on nvme device