I can confim this, too. Machine is a Toshiba Satellite C850D - 119. Windows 8 has been pre-installed. The regular user isn't satisfied, so a Linux install was desired. Nevertheless, Windows 8 will still be required. The regular user is of very poor "computer know-how", so dual-booting via the GRUB menu should be fine, while having to perform several steps (going through the UEFI menus) isn't acceptable.
I installed Ubuntu GNOME 14.04.1 after shrinking the windows main partition, left all of the other partitions untouched. The installation procedure went fine, booting Ubuntu from the GRUB 2 menu works very well. Booting Windows 8 from the GRUB 2 menu doesn't work unless secure boot is disabled. The idea of comment #25 also didn't work with secure boot enabled (same error message, as with original os_prober generated menu entry). Disabling secure boot is however a workaround. Booting Windows 8 from the UEFI boot menu works regardless of secure boot enabled or disabled. I didn't try rEFIned yet. I think, GRUB (or os_prober) should be able to handle this by themselves. As the problem doesn't seem to exist for openSuSE, could a comparison of GRUB or os_prober (Ubuntu vs. openSuSE) give more information? -- 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 ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
