[Bug 390347] [NEW] Kernele update for 9.04 does not find root filesystem on LVM.

[ashayh]

Public bug reported:

lsb-release -rd :

Description:	Ubuntu 9.04
Release:	9.04


apt-cache policy linux-image-2.6.28-11-generic :

linux-image-2.6.28-11-generic:
  Installed: 2.6.28-11.42
  Candidate: 2.6.28-11.42
  Version table:
 *** 2.6.28-11.42 0
        500 http://us.archive.ubuntu.com jaunty/main Packages
        100 /var/lib/dpkg/status


apt-cache policy linux-image-2.6.28-13-generic :

linux-image-2.6.28-13-generic:
  Installed: 2.6.28-13.44
  Candidate: 2.6.28-13.44
  Version table:
 *** 2.6.28-13.44 0
        500 http://us.archive.ubuntu.com jaunty-updates/main Packages
        100 /var/lib/dpkg/status


apt-cache policy initramfs-tools :

initramfs-tools:
  Installed: 0.92bubuntu29
  Candidate: 0.92bubuntu29
  Version table:
 *** 0.92bubuntu29 0
        500 http://us.archive.ubuntu.com jaunty/main Packages
        100 /var/lib/dpkg/status


What happened:

I installed 9.04 from Live CD on to LVM, including root on a LVM volume.

Things worked for for a while until some package decided to update the initrd. And the root file system could not be found. I ran various combinations of mkinitramfs and update-initramfs, including modifying the initramfs.conf file.
Nothing worked. (How do I figure out which package modifies the initrd?)

Since I was still using the kernel that comes with the Live CD, I booted
the Live CD, installed lvm2, mounted the logical volumes, chrooted in /
logical  volumes, and ran mkinitramfs. That worked. Now I keep copies of
the working 2.6.28-11-generic initrd.

Things worked until I recently upgraded my kernel from 2.6.28-11-generic to 2.6.28-13-generic .
After the reboot, 2.6.28-13-generic cannot mount the root file system on lvm.  I just rebooted to the 2.6.28-11 kernel.

I can again boot the Live CD, install 2.6.28-13-generic and etc and
hopefully it will work. But what can I do to make sure a new kernel
install works fine?

The line for root in fstab looks like this:

UUID=2b9364ea-8a05-49d6-a269-e77806d141a4                       /
ext4                   relatime,errors=remount-ro     0       1

The kernel line for both kernels in grub is like this:

kernel          /vmlinuz-2.6.28-11-generic root=/dev/mapper/ubuvg-rootvg
ro  single

kernel          /vmlinuz-2.6.28-13-generic root=/dev/mapper/ubuvg-rootvg
ro  single

I understand that a while ago the dm_ modules were moved inside the kernel and are not separate modules anymore.
When they were separate, it was easy to add modules in /etc/initramfs-tools/modules (just one of the ways to add modules).


What I expect to happen:

A new kernel install or a package that changes the initrd, understand that I have lvm in use.
Why doesn't the new kernel install understand that I have LVM file systems mounted and are in my fstab?

** Affects: initramfs-tools (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: initramfs kernel lvm lvm2 modules

-- 
Kernele update for 9.04 does not find root filesystem on LVM.
https://bugs.launchpad.net/bugs/390347
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