[Bug 1183074] Re: GRUB fails to boot Windows when SecureBoot enabled

Steve Langasek steve.langasek at canonical.com
Wed May 22 21:54:46 UTC 2013


Please show the grub.cfg that was generated by grub2 for booting
Windows, and also show the output of 'efibootmgr -v' for this system

** Package changed: shim (Ubuntu) => grub2 (Ubuntu)

** Changed in: grub2 (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1183074

Title:
  GRUB fails to boot Windows when SecureBoot enabled

Status in “grub2” package in Ubuntu:
  Incomplete

Bug description:
  Computer with preinstalled Windows8. SecureBoot enable by default.

  1) User installed Ubuntu13.04 64bit.
  After install and reboot, GRUB appears, allows to boot Ubuntu correctly, but the Windows entry fails.

  2) Used Boot-Repair's Recommended Repair, which added some Windows entries in /etc/grub.d/25_custom
  http://paste.ubuntu.com/5686992
  No entry allow to boot Windows

  3) Disabled SecureBoot in the UEFI firmware, then ran Boot-Repair's Recommended Repair, which purged grub (and shim and linux-signed) then installed grub-efi.
  http://paste.ubuntu.com/5689721
  User can now boot Windows from GRUB.

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