[Bug 1024383] Re: invalid Windows EFI entries in GRUB

[YannUbuntu]

Example of invalid Windows8 entry on UEFI system:

http://ubuntuforums.org/showpost.php?p=12379417&postcount=32

menuentry 'Windows 8 (loader) (on /dev/sda3)' --class windows --class os $menuentry_id_option 'osprober-chain-98F2-07ED' {
	insmod part_gpt
	insmod fat
	set root='hd0,gpt3'
	if [ x$feature_platform_search_hint = xy ]; then
	  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt3 --hint-efi=hd0,gpt3 --hint-baremetal=ahci0,gpt3  98F2-07ED
	else
	  search --no-floppy --fs-uuid --set=root 98F2-07ED
	fi
	drivemap -s (hd0) ${root}
	chainloader +1
}

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

Title:
  invalid Windows EFI entries in GRUB

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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