My laptop is ASUS S550C with Windows 8 pre-installed. - Prepared partitions using Windows' own disk management utility. deleting D and shrinking C. - I prepared a Ubuntu 13.04 (64 bit) ISO to boot with a USB. - I Disabled Fast Boot. and disabled FastStartup. - I used multiple media USB and DVD trying 13.4 and 12.10 every time when I reach the try Ubuntu install menu every choice leads to black screen. just like the other bug reporter "when I try to boot Ubuntu installation via USB/DVD in SecureBoot, computer doesn't give any error output, it is able to show me the UEFI boot menu (Install Ubuntu, Try Ubuntu, Check Disk for Errors, etc.) but when I select any of them, it just waits in black screen without any error message." I only figured out it was a secure boot issue when I followed some advice to try Grub commands. At that point I got a secure boot doesn't allow loading module error. so I disabled SecureBoot. Ubuntu installs fine. Restarts fine. Grub window item leads to error message about device map not found and efi path incorrect if I turn on SecureBoot. Windows loads immediately and Ubuntu is ignored. So I checked and confirmed efi grub was installed. I followed your advice and did > sudo apt-get install grub-efi-amd64-signed shim-signed > sudo grub-install --uefi-secure-boot Now if I disable SecureBoot Ubuntu works and I still get the windows error form grub If I enable SecureBoot I actually get a grub selection menu. Which is progress I suppose. But now if I choose any Ubuntu item I get a purple screen vs. a black one I was getting from the installation media. And Windows 8 still won't run from Grub same device map efi path error? help.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1201257 Title: Secure Boot doesn't work with ASUS S56CB To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/shim/+bug/1201257/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs