[Bug 1093523] Re: os-prober doesn't detect Windows UEFI

[Shaun Turnbull]

*** This bug is a duplicate of bug 1024383 ***
    https://bugs.launchpad.net/bugs/1024383

After looking at both bugs i do not think this is a duplicate

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https://bugs.launchpad.net/bugs/1093523

Title:
  os-prober doesn't detect Windows UEFI

Status in “os-prober” package in Ubuntu:
  Confirmed

Bug description:
  I got some problem during the installation of Ubuntu on a UEFI ultrabook.
  I give you all the infos about what I have done:
  1) restore my laptop to the factory default configuration (so only Windwos 8 was on my harddrive);
  2) install Ubuntu Secure Remix 12.10 30nov2012 (64bit); here I got the first "surprise": "This computer currently has no detected operating system" and using os-prober (1.56ubuntu1) I got "/dev/sda6:Windows Recovery Environment (loader):Windows:chain", while I also should got "/dev/sda2:Window 8.....". Here you can find the Boot Info Script http://paste.ubuntu.com/1460646/;
  3) so I aborted the installation and I tried to verify my harddrive partition scheme through fixparts under Windows 8. Apparently everything was fine;
  4) I tried a new installation of Ubuntu selecting "Other" and performing a manual partioning. The installation ended fine. At the first reboot I was only able to load Ubuntu through the grub2. Here you can read the Boot Info script at that moment http://paste.ubuntu.com/1460627/;
  5) so I performed boot-repair to get back Windows loading at the grub2 shell. After that the Boot Info Script was http://paste.ubuntu.com/1460646/ (os-prober continues to give only "/dev/sda6:Windows Recovery Environment (loader):Windows:chain");
  6) at the next reboot this was what I got at the grub2 options:
  a) ubuntu (that loads correctly Ubuntu OS);
  b) advance options for Ubuntu;
  c) Windows UEFI loader (that loads properly Windwos 8);
  d) Windows Boot UEFI bootx64.efi.bkp (as c);
  e) Windows Recovery Enviroment (loader) (on /dev/sda6) (this gives the following error messages: error: impossible find command'drivemap'; error: invalid EFI file path; press any key to continue (and it comes back to grub2);

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