[Bug 1292628] Re: 'grub-install --force "(hd0)"' fails on trusty during installation

[Steve Langasek]

This problem has been tracked back to a use of 'bootloader --location
mbr' in a kickstart file, which kickseed translates into:

   ks_preseed d-i grub-installer/bootdev string '(hd0)'

grub-installer then uses this string as-is as an argument to grub-
install, without first ensuring the availability of a grub device map.
Apparently with the recently rewritten grub-install, that doesn't work.

Not sure if this should be fixed in grub-install or grub-installer, but
clearly somebody needs to take responsibility for creating the grub
devicemap. :)

** Changed in: grub2 (Ubuntu)
       Status: Confirmed => Triaged

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https://bugs.launchpad.net/bugs/1292628

Title:
  'grub-install --force "(hd0)"' fails on trusty during installation

Status in “grub2” package in Ubuntu:
  Triaged

Bug description:
  Network/PXE installs of Trusty fail on installing grub.

  The error message in syslog is:

  Installing grub on '(hd0)'
  Running chroot /target grub-install --force "(hd0)"
  Installing for i386-pc platform
  grub-install: error: disk `hd0' not found
  error: Running 'grub-install --force ''(hd0)''' failed.

  The workaround is the following

  chroot target
  echo "(hd0) /dev/sda" > /boot/grub/device.map

  Then prompting the installer to try installing again.

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