[Bug 1103187] Re: automatic updates tend to reboot and die into grub rescue

[Phillip Susi]

Ok, I think I know what is going on here.  Grub does not know how to
replay the XFS journal and your reboot must not be unmounting the fs,
leaving it in a damaged state.  Mounting or fscking the filesystem from
a livecd replays the journal and corrects the errors.

The sync should make sure the filesystem is consistent though, so it
sounds like there is a bug in the kernel filesystem driver.


** Summary changed:

- automatic updates tend to reboot and die into grub rescue
+ xfs left inconcistent after reboot, causing grub to fail

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https://bugs.launchpad.net/bugs/1103187

Title:
  xfs left inconcistent after reboot, causing grub to fail

Status in “grub2” package in Ubuntu:
  Triaged
Status in “linux” package in Ubuntu:
  New

Bug description:
  take a 12.10 with XFS root partition containing the /boot/ tree
  dpkg-reconfigure grub-pc ; sync
  reboot (either by command, or by menu)
  diverse error messages + grub rescue + /boot/ is partially accessible

  boot UBUNTU 12.10 pendrive + choose "try Ubuntu" + open a terminal
  sudo -s; mkdir foo; mount [the XFS root partition] foo; umount foo
  reboot into the "original" Ubuntu is NOW successful

  It appears that the kernel xfs filesystem driver leaves the fs in an
  inconsistent state even after a sync.  That is corrected by a journal
  playback done either via having the kernel mount or running fsck, but
  grub does not use the xfs journal.

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