[Bug 772270] Re: initramfs uses bad lvm lvname to mount /

[Thomas DEBESSE]

Hum, sorry, I forgot to mention here that I had investigated.

It was in fact a bug inside a lilo-compatibility layer in grub (or
initramfs-tools, I do not know since the time) when using grub. A lilo-
compatibility layer reconfigured encrypted bootdrive management
regardless of the kernel boot parameter. Another solution was to
configure crypttab with less information so the lilo-compatibility layer
failed and and let grub do its job…

This is very old but it is probable that the bug is still there in more
recent distribtuions. The bug appears only when you are too verbose in
crypttab, so the default installation does not seem affected. I will
reproduce the test.

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Title:
  initramfs uses bad lvm lvname to mount /

Status in “initramfs-tools” package in Ubuntu:
  Incomplete

Bug description:
  Binary package hint: initramfs-tools

  First symptom : at boot, the message "No init found. Try passing init= bootarg."
  Boot fails.

  I'm upgrading to Natty from Maverick

  My configuration :
  /dev/sda1 : /boot
  /dev/sda5 : an encrypted luks volume containing an LVM physical volume

  the volume groupe name is "arwen", the logical volume name for / is "racine"
  the device containing rootfs is named /dev/mapper/arwen-racine

  hence, my grub menuentry looks like this :

  menuentry 'Ubuntu, avec Linux 2.6.38-8-generic' --class ubuntu --class gnu-linux --class gnu --class os {
   recordfail
   savedefault
   set gfxpayload=$linux_gfx_mode
   insmod part_msdos
   insmod ext2
   set root='(hd0,msdos1)'
   search --no-floppy --fs-uuid --set=root uuiduuid-uuid-uuid-uuid-uuiduuiduuid
   linux	/vmlinuz-2.6.38-8-generic root=/dev/mapper/arwen-racine ro   quiet splash vt.handoff=7
   initrd	/initrd.img-2.6.38-8-generic
  }

  Sometimes, the error is more verbose, I've get yesterday a message which said the system attempt to mount /dev/mapper/arwen on initramfs' /root, but it's a mistake, my rootfs is on /dev/mapper/arwen-racine.
  The root= kernel argument is correct, but an initramfs script mades a mistake.

  From initramfs' shell I've mounted my /boot partition, then create a new initrd.img hardcoding /dev/mapper/arwen-racine path on the  line 91 of scripts/local, then reboot, then choose my new initramfs from the grub editor…
  The boot does'nt complain and I'm writing this bug report from Natty. :)

  So, there is a bug in one script into initramfs which troncate the volume group name of / .
  I've not found where.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.04
  Package: initramfs-tools 0.98.8ubuntu3
  ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
  Uname: Linux 2.6.38-8-generic x86_64
  Architecture: amd64
  Date: Thu Apr 28 12:21:09 2011
  InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=fr_FR:en
   PATH=(custom, user)
   LANG=fr_FR.UTF-8
   SHELL=/bin/bash
  SourcePackage: initramfs-tools
  UpgradeStatus: Upgraded to natty on 2011-04-21 (6 days ago)

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