[Bug 465231] Re: Karmic: legacy grub-install fails, possibly due to missing /target/etc/mtab

[felipe valenzuela]

Sorry guys but I'm a beginner. I was trying to install Ubuntu 12.04 LTS
(from pendrive bootable files) and when the process was ending it gives
me this warning about the "grub-installer". Can you tell me step by step
what to do do to solve it?

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Title:
  Karmic: legacy grub-install fails, possibly due to missing
  /target/etc/mtab

Status in “grub-installer” package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: debian-installer

  Encountered this using the Karmic alternate installer (specifically,
  netboot via PXE). Same failure mode on both i386 and amd64.

  After confirming whether to install GRUB on the MBR, the installer
  indicates "Executing 'grub-install (hd0)' failed. This is a fatal
  error."

  The log on tty4 shows some "cannot read table of mounted file systems"
  warnings, suggesting that grub-install(8) is failing due to a missing
  /etc/mtab file (inside the /target chroot).

  See the attached screenshots to see what I'm seeing.

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