Hello, Was having exactly this issue: step 7 in the bug description with a Toshiba Satellite C55-A-11Q laptop. Everything was verified, secure boot mode on, UEFI boots shimx64, shimx64 launches grub2, correct UEFI entries (using efibootmgr). Never used boot-repair. The only thing I made: adding a grub2 menu entry in a new /etc/grub.d/50_win8 file as suggested in comment #25. But Windows 8 refused to boot from Grub, only from system setup menu (F12 key).
This was resolved by upgrading the BIOS to the last version (from Toshiba support Web site - e.g. for this laptop from 1.00 to 1.30). Now the laptop can boot, with secure boot mode on, from Grub menu: Ubuntu, Windows 8, system setup (UEFI) without any problem. Only my two cents, there is probably a bug in the booting chain, but not only, some buggy BIOS can let you search for days a solution to this problem. Cordially, -- NVieville -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1091464 Title: Unable to chainload Windows 8 with Secure Boot enabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1091464/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
