[Bug 1021930] [NEW] Windows7 missing after upgrading from 10.04 to 12.04

[YannUbuntu]

Public bug reported:

PC with dual-boot Windows7 /Ubuntu.

After upgrading from 10.04 to 12.04, the grub menu went away (no GRUB
menu at all, so no access to any OS).


Remark : after reinstalling GRUB into the MBR of sdb, the grub menu came back, which restored access to Ubuntu.
But still no access to Windows7.

See BootInfo log: http://paste.ubuntu.com/1078445

** Affects: grub2 (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1021930

Title:
  Windows7 missing after upgrading from 10.04 to 12.04

Status in “grub2” package in Ubuntu:
  New

Bug description:
  PC with dual-boot Windows7 /Ubuntu.

  After upgrading from 10.04 to 12.04, the grub menu went away (no GRUB
  menu at all, so no access to any OS).


  Remark : after reinstalling GRUB into the MBR of sdb, the grub menu came back, which restored access to Ubuntu.
  But still no access to Windows7.

  See BootInfo log: http://paste.ubuntu.com/1078445

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