[ubuntu] Grub error: "grub_efi_secure_boot'

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http://ubuntuforums.org – Hi, I have a problem with my Lenovo ThinkPad T420. Since an update, i think two days, ago my laptop won't boot anymore. I get following error message: Code: error: symbol not found: 'grub_efi_secure_boot'. error: symbol not found: 'grub_efi_secure_boot'. My Laptop is running with UEFI BIOS Version 1.42 so it is using EFI but not secure boot. I'm using Ubuntu 12.04 and formatted my hard disk as following: hd0 gpt1: EFI fat partition gpt2: /boot (ext2, "GRUB version 1.99-21ubuntu3.7") gpt3: encrypted with LVM volume group inside I think the reason for this is an update of GRUB (Hardware)