[Bug 1717975] [NEW] No error details shown when grub-install fails

[Paul Schreiber]

Public bug reported:

I attempted to install Ubuntu 17.04 server. The install stopped because grub-install (i.e. grub-install /dev/sda) failed. Something like this:
   Unable to install GRUB in /dev/sda
   Executing `grub-install /dev/sda` failed.
   This is a fatal error.

However, no error details were shown. This made debugging very
difficult.

Only when I ran grub-install from the shell prompt, I was able to see why:
grub-install: warning: Attempting to install GRUB to a disk with multiple partition labels.  This is not supported yet..
grub-install: error: embedding is not possible, but this is required for RAID and LVM install.

** Affects: debian-installer (Ubuntu)
     Importance: Undecided
         Status: New

** Summary changed:

- No error details show when grub-install fails
+ No error details shown when grub-install fails

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https://bugs.launchpad.net/bugs/1717975

Title:
  No error details shown when grub-install fails

Status in debian-installer package in Ubuntu:
  New

Bug description:
  I attempted to install Ubuntu 17.04 server. The install stopped because grub-install (i.e. grub-install /dev/sda) failed. Something like this:
     Unable to install GRUB in /dev/sda
     Executing `grub-install /dev/sda` failed.
     This is a fatal error.

  However, no error details were shown. This made debugging very
  difficult.

  Only when I ran grub-install from the shell prompt, I was able to see why:
  grub-install: warning: Attempting to install GRUB to a disk with multiple partition labels.  This is not supported yet..
  grub-install: error: embedding is not possible, but this is required for RAID and LVM install.

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