[Bug 1180685] Re: update-grub makes grub2 point on an incorrect UUID

[Phillip Susi]

** Changed in: grub2 (Ubuntu)
       Status: New => Invalid

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Title:
  update-grub makes grub2 point on an incorrect UUID

Status in “grub2” package in Ubuntu:
  Invalid

Bug description:
  Hi

  'lsb_release -rd'
  Description:	Ubuntu 12.04.2 LTS
  Release:	12.04

  'apt-cache policy pkgname'
  N: Impossible de trouver le paquet pkgname


  The bug I want to report is very similar to bug #442631, maybe even
  the same bug. I however report the present bug as, to my
  understanding, bug #442631 has not been cleared.

  Here is my partitions block id's

  remi at remi-Vostro-3550:~$ sudo blkid
  [sudo] password for remi: 
  /dev/sda10: LABEL="PASSERELLEM-t" UUID="6272-45BA" TYPE="vfat" 
  /dev/sda11: LABEL="maisonnette" UUID="dea2a123-c985-4a5c-bc98-975c6bd8386b" TYPE="ext4" 
  /dev/sda2: LABEL="OS" UUID="AC7C4EC27C4E86D4" TYPE="ntfs" 
  /dev/sda5: LABEL="xubuntu" UUID="5193ea50-93a3-41f0-9e40-acd7c80a0877" TYPE="ext4" 
  /dev/sda6: LABEL="ciel_remi" UUID="498F2C6F49CED050" TYPE="ntfs" 
  /dev/sda9: LABEL="Archives" UUID="5ecd6806-5db8-4670-a2fd-079df82cf0d6" TYPE="ext4" 
  /dev/sda1: LABEL="Data" UUID="3ee2811f-d984-4ff4-9698-36f083fecda1" TYPE="ext4" 
  /dev/sda4: LABEL="swap" UUID="857dda1a-4d1f-4e71-bd5d-d6c96e8032c6" TYPE="swap" 
  /dev/sda7: LABEL="Pingolin" UUID="bedf892b-d69d-45ba-a16c-59b32a8e031c" TYPE="ext4" 
  /dev/sda8: LABEL="Multimedia" UUID="3b5a9083-e27a-4f2f-917d-56945ff7fd4e" TYPE="ext4" 
  /dev/sda12: LABEL="boot" UUID="1022a339-49dc-41fd-bc26-a8cb207dcb82" TYPE="ext2" 
  remi at remi-Vostro-3550:~$ 

  I've got a boot partition on /dev/sda12, nammed "boot

  Here is a regular menuentry to boot to Ubuntu 12.04 Precise Pingolin
  on /dev/sda7

  menuentry 'Ubuntu, avec Linux 3.2.0-41-generic-pae' --class ubuntu --class gnu-linux --class gnu --class os {
  	recordfail
  	gfxmode $linux_gfx_mode
  	insmod gzio
  	insmod part_msdos
  	insmod ext2
  	set root='(hd0,msdos12)'
  	search --no-floppy --fs-uuid --set=root 1022a339-49dc-41fd-bc26-a8cb207dcb82
  	linux	/vmlinuz-3.2.0-41-generic-pae root=UUID=bedf892b-d69d-45ba-a16c-59b32a8e031c ro   quiet splash $vt_handoff
  	initrd	/initrd.img-3.2.0-41-generic-pae
  }

  It appears that root is set to /dev/sda12 for looking for the vmlinuz
  and initrd.img files, and that the linux line refers to Pingolin's
  UUID to pass the root partition to the kernel.

  Here is the wrong menu entry, to boot to xubuntu (also a 12.04
  version) on /dev/sda5

  menuentry "Ubuntu, avec Linux 3.2.0-41-generic-pae (on /dev/sda5)" --class gnu-linux --class gnu --class os {
  	insmod part_msdos
  	insmod ext2
  	set root='(hd0,msdos12)'
  	search --no-floppy --fs-uuid --set=root 1022a339-49dc-41fd-bc26-a8cb207dcb82
  	linux /vmlinuz-3.2.0-41-generic-pae root=UUID=bedf892b-d69d-45ba-a16c-59b32a8e031c ro quiet splash $vt_handoff
  	initrd /initrd.img-3.2.0-41-generic-pae
  }

  It appears that root is still correctly set, by the linux line still
  refers to Pingolin's UUID as the root partition, instead of the
  xubutu's UUID (5193ea50-93a3-41f0-9e40-acd7c80a0877)

  You can find the boot report as it has been created by boot-report at 
  http://paste.ubuntu.com/5669945/
  Beware that the grub.cfg file to be considered is located at line 491

  Regards

  Arbiel

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