After a clean install (pre-installed Win 10 removed) of Ubuntu 14.04.4 on Dell Inspiron 13-7359 I am not able to boot the OS in "Secure mode".
What was done:
- First installed standalone Ubuntu 15.10 - installation OK, but in BIOS there was no visible device (for EFI mode), which I could boot from. After several re-installations ("Auto" Erase and install, Manual partitioning, ...) there was no progress.
- Installed standalone Ubuntu 14.04.4. Installation OK, didn't boot to OS. BIOS found a disk to boot from, but this message appeared: "Operating system loader has no signature.". Tried Boot-repair from live disk - no progress. Pastebin report.
Current situation - Ubuntu boots in "Non-secure" Legacy mode. Everything works fine.
I'm curious what I did wrong, as there is always solution - I didn't find it, even there are some Q&A to similar problems Nothing helped me out of this.
Update:
After reading answers, identified that the problem probably lies in installation USB media, tried following solutions (8 GB USB flash formatted to FAT32 FS)
- Disks (gnome-disk-utility) application in Ubuntu 15.10
- created bootable Ubuntu 14.04.4 USB flash
- media was not visible in ntb BIOS in UEFI & SecureBoot configuration
dd
in terminal (Ubuntu 15.10)- created bootable Ubuntu 14.04.4 USB flash
- not visible in ntb BIOS in UEFI & SecureBoot configuration
- Rufus (in Win7)
- Bootable USB flash with GPT for UEFI (Rufus option)
- created Ubuntu 14.04.4 live USB flash
- visible in ntb BIOS
- din't boot in UEFI & SecureBoot configuration
- Error Message: "Operating System Loader signature not found in SecureBoot database"
- But USB booted successfully with UEFI On & SecureBoot Off configuration (path to boot file :
/EFI/boot/grubx64.EFI
) - Try to install in automatic mode "Erase and reinstall" offered to create only main ext4 and swap paritions
- In "Something else" option, I was able to managed creating an ext4 main partition, a 8GB swap and a 601 MB EFI partition (previously reserved 201 MB was not enough for the installer)
- Installation OK
- After reboot SecureBoot enabled and booted in UEFI & SecureBoot configuration
- Also there is a folder
/sys/firmware/efi
now (which should indicate that there was no fallback to compatibility mode) - => Problem Resolved