[Bug 941100] Re: bug about “grub-installer” on raid, install with ubiquity. Possibly related to bug #936115?

[SoftLibre]

With a usb-live, it's ok :-D
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ubuntu at ubuntu:~$ sudo mount /dev/mapper/pdc_caahdjahe2 /mnt
ubuntu at ubuntu:~$ sudo mount --bind /dev /mnt/dev
ubuntu at ubuntu:~$ sudo mount --bind /dev/pts  /mnt/dev/pts
ubuntu at ubuntu:~$ sudo mount --bind /proc /mnt/proc
ubuntu at ubuntu:~$ sudo mount --bind /sys  /mnt/sys
ubuntu at ubuntu:~$ sudo chroot /mnt

root at ubuntu:/# sudo update-grub2
Generating grub.cfg ...
Found linux image: /boot/vmlinuz-3.2.0-17-generic
Found initrd image: /boot/initrd.img-3.2.0-17-generic
Found memtest86+ image: /boot/memtest86+.bin
Found Linux Mint 12 Lisa (12) on /dev/sdc1
Found Windows 7 (loader) on /dev/mapper/pdc_caahdjahe1
Found Ubuntu 10.10 (10.10) on /dev/mapper/pdc_dffabaibi1
grep: el fichero de entrada `/boot/grub/grub.cfg.new' también es el de salida
done
root at ubuntu:/# grub-install /dev/mapper/pdc_caahdjahe
Installation finished. No error reported.
root at ubuntu:/# 
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https://bugs.launchpad.net/bugs/941100

Title:
  bug about “grub-installer” on raid, install with ubiquity. Possibly
  related to bug #936115?

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

Bug description:
  At the conclusion of the SO install, grub is not able to run "grub-install /dev/mapper/pdc_caahdjahe"
  Choose the partition you choose, always gives error

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: ubiquity 2.9.21
  ProcVersionSignature: Ubuntu 3.2.0-17.27-generic 3.2.6
  Uname: Linux 3.2.0-17-generic x86_64
  ApportVersion: 1.93-0ubuntu2
  Architecture: amd64
  CasperVersion: 1.304
  Date: Sat Feb 25 21:20:35 2012
  InstallCmdLine: noprompt cdrom-detect/try-usb=true file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- debian-installer/language=es keyboard-configuration/layoutcode?=es
  LiveMediaBuild: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120225)
  ProcEnviron:
   LANGUAGE=es_ES.UTF-8
   TERM=unknown
   PATH=(custom, no user)
   LANG=es_ES.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (fresh install)

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