** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1809168
Title:
FIPS and Ubuntu standard kernels prior to 4.11.0 won't boot; root
device not found
Status in linux package in Ubuntu:
Confirmed
Bug description:
[IMPACT]
Booting of the Xenial-based FIPS kernel packages
failed with disk not found errors on amd64.
This was also observed on standard Ubuntu
kernels prior to 4.11.0.
FIPS
------
1. linux-image-4.4.0-1002-fips <-- FAIL
2. linux-image-4.4.0-1006-fips <-- FAIL
UBUNTU
------------
1. Bionic kernels all WORK
2. Artful kernels:
Ubuntu-4.11.0-1.6 <-- WORKS
Ubuntu-4.10.0-26.30 <-- FAILS
3. Xenial kernels:
Ubuntu-hwe-4.11.0-12.17_16.04.1 <--- WORKS
Ubuntu-hwe-4.10.0-43.47_16.04.1 <--- FAILS
Ubuntu-lts-* <--- ALL FAIL
Ubuntu-4.4.0-* <--- ALL FAIL
We have narrowed down the window to be:
4.11.0-1.6 (custom build) <--- WORKS
4.10.0-43.47~16.04.1 <-- FAILS
Also works:
https://kernel.ubuntu.com/~kernel-ppa/mainline/v4.11/linux-image-4.11.0-041100-generic_4.11.0-041100.201705041534_amd64.deb
Symptoms
-------------
System cannot find the root disk and drops into
an initramfs shell:
mdadm script local-block "CREATE group disk not found"
"Gave up waiting for root device. Common problems:
- Boot args (cat /proc/cmdline)
- Check rootdelay=...
- Check root= ...
- Missing modules (cat /proc/modules; ls/dev)
ALERT! UUID=... does not exist. Dropping to a shell!
...
(initramfs)_
There does not appear to be any workaround so far.
The disks are encrypted SSDs.
Attaching commit list between the last known
failing Artful kernel and earliest known
working kernel (adjacent tags) and other info.
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