[Bug 1024383] Re: update-grub generates only BIOS based menu entries for Windows, even on UEFI systems

[Christopher Welborn]

Same here, i manually disabled bad entries like /dev/sdXY and use the
good ones (EFI entries). Still, whenever I get an update the entries
show up again. This is not a huge problem for me, but it would be
awesome if grub could fix this and I didn't have to edit my config
again. Also, this is probably a different kind of bug, but it recognizes
a lot of backup efi's like "bootx64.efi.bkp" or something like that and
labels them as "Windows 8 EFI" . I'd wish it said "Windows 8 EFI -
Backup" and the regular efi files were labeled correctly. I think it all
has to do with the same thing (my opinion as an independent
developer/user), probing for OS's and examining file contents.

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https://bugs.launchpad.net/bugs/1024383

Title:
  update-grub generates only BIOS based menu entries for Windows, even
  on UEFI systems

Status in “grub2” package in Ubuntu:
  Confirmed
Status in “os-prober” package in Ubuntu:
  Confirmed
Status in “grub2” package in Debian:
  New

Bug description:
  64bits computer with pre-installed EFI Windows 7. (remark: same bug if
  Windows8)

  Installed Ubuntu 64bits in dual-boot. GRUB (grub-efi) is correctly
  installed and allows to boot Ubuntu, but it does not allow to boot
  Windows.

  Its menu shows 2 INVALID Windows entries. When selecting these
  entries, it displays "Invalid EFI file path" error, and returns to
  GRUB menu.

  It appears that GRUB creates BIOS/mbr entries when it should be
  UEFI/gpt type entries.

  *********************** WORKAROUND **************************

  either boot Windows from the (EFI) BIOS menu, or add valid Windows entries via Boot-Repair.
  ***************************************************************

  (original thread in French: http://forum.ubuntu-
  fr.org/viewtopic.php?pid=10010231#p10010231 )

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