Public bug reported:
The xenial initramfs will not mount the root partition using the
UUID=XXX format when the root drive is mapped (e.g., through a LVM).
update-grub builds its menu.lst file with kernel command line parameters for
root= as, e.g.,
kernel /vmlinuz-4.4.0-16-generic
root=UUID=2dddd69e-e70b-45c2-a262-abcdabcdabcdabcd ro quiet splash
Solution is to change UUID to /dev/mapper format, e.g.,
kernel /vmlinuz-4.4.0-16-generic root=/dev/mapper/mylvm-root ro quiet
splash
by changing the kopt line in /boot/grub/menu.lst and re-running update-grub.
Note: tested with /etc/fstsab using /dev/mapper/ mount points.
(Upgraded from wily -> xenial.)
Description: Ubuntu Xenial Xerus (development branch)
Release: 16.04
Linux X200s 4.4.0-16-generic #32-Ubuntu SMP Thu Mar 24 22:38:01 UTC 2016 x86_64
x86_64 x86_64 GNU/Linux
Package: initramfs-tools
Version: 0.122ubuntu6
Package: grub
Version: 0.97-29ubuntu68
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: grub 0.97-29ubuntu68
ProcVersionSignature: Ubuntu 4.4.0-16.32-generic 4.4.6
Uname: Linux 4.4.0-16-generic x86_64
ApportVersion: 2.20.1-0ubuntu1
Architecture: amd64
CurrentDesktop: KDE
Date: Sat Apr 2 00:48:58 2016
InstallationDate: Installed on 2014-08-16 (595 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
SourcePackage: grub
UpgradeStatus: Upgraded to xenial on 2016-04-01 (1 days ago)
** Affects: grub (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug xenial
** Attachment removed: "JournalErrors.txt"
https://bugs.launchpad.net/ubuntu/+source/grub/+bug/1565226/+attachment/4620281/+files/JournalErrors.txt
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https://bugs.launchpad.net/bugs/1565226
Title:
update-grub overenthusiastically places root=UUID=XXX (xenial)
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