[bug #37129] grub-install (1.99) fails with a 126 error code

[Yann]

URL:
  <http://savannah.gnu.org/bugs/?37129>

                 Summary: grub-install (1.99) fails with a 126 error code
                 Project: GNU GRUB
            Submitted by: yannubuntu
            Submitted on: ven. 17 août 2012 07:06:15 GMT
                Category: Installation
                Severity: Major
                Priority: 5 - Normal
              Item Group: Software Error
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: Rik
        Originator Email: address@hidden 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 
                 Release: other
         Reproducibility: Every Time
         Planned Release: None

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Details:

Originaly posted at https://bugs.launchpad.net/grub/+bug/1037922

The user (Rik = rufn) reported this problem:
- Just before the problem appeared: Rik is not certain what he was doing but
he may have disconnected a second hdd, he now only has one drive connected and
had 2 earlier. He also installed the latest updates.
- Then: the system failed to boot and gave message "unknown filesystem grub
???"
- Attempt of GRUB repair: Rik ran Boot-Repair (from a Boot-Repair-Disk), and
selected the recommended repair, which tried to reinstall GRUB via chroot into
the installed Ubuntu (log: http://paste.ubuntu.com/1149152 ).

As we can see in the log:
- grub-install failed (MBR still points to sda6 when it should point to sda1)
- grub-install returned a 126 error code




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