[Bug 1079185] Re: Wrong bootarg for disk with label

[Adam Conrad]

Verified that flash-kernel now behaves correctly on filesystems where
blkid returns the label before the uuid.  Of note, this won't fix the
ubiquity-based installer, as flash-kernel-installer is built in to
ubiquity (and thus the images), and we're not respinning quantal images,
but this does fix this same bug in both the netboot installer and in
userspace, post-install.

** Tags removed: verification-needed
** Tags added: verification-done

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https://bugs.launchpad.net/bugs/1079185

Title:
  Wrong bootarg for disk with label

Status in “flash-kernel” package in Ubuntu:
  Fix Released
Status in “flash-kernel” source package in Quantal:
  Fix Committed
Status in “flash-kernel” source package in Raring:
  Fix Released

Bug description:
  [Impact]

  Installation fails on a Pandaboard on Quantal for users who previously
  had a volume label on an existing partition.

  [Test Case]

  Create and label an existing partition (eg. using e2label). Then run
  the installer. On first reboot, if the bug still exists, the system
  will fail to mount the root filesystem.

  [Regression Potential]

  We're changing calls to blkid only by being specific that we want the
  UUID instead of assuming that the UUID is on the first line. This has
  been tested in d-i on Quantal. I can only see this regression if blkid
  doesn't work as expected in this specific mode in some obscure case
  that we haven't considered.

  [Original Description]

  I just installed Ubuntu 12.10 on a pandaboard.

  At the installation, I selected an empty partition named "ubuntu2" et
  checked the box for formating.

  After the installation process, at the first boot, rootfs couldn't be
  mounted : the bootarg was "root=UUID=ubuntu2"

  So I changed the preEnv.txt on my computer to "root=LABEL=ubuntu2" but
  sill couldn't boot, as the label was erased during format process.

  I fixed it thanks to busybox by putting back label "ubuntu2" to my
  /dev/sda2 partition.

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