I have an HP ProBook G1 with Windows 8.1 OEM on which I installed Ubuntu 14.04 LTS in dualboot. This laptop has a BIOS that makes it difficult to change the default boot loader called at hardware boot, and I guess that is why HP came with an update for its BIOS, allowing new EFI entries to be added :
ENHANCEMENTS:
- Provides support for third party encryption software to add new UEFI boot entries.
So I would like to update my BIOS, but I also would like to know the precautions I should take before doing it, because I have read topics dealing with issues after BIOS updates on other machines, such as :
- superuser.com/questions/376470/how-to-reinstall-grub2-efi
- superuser.com/questions/372962/why-would-an-efi-bios-update-break-the-efi-boot-manager
"After successfully updating my bios, something went wrong and I ended up with a blinking cursor on the top left corner of a black screen. No errors, no nothing. The bios now only listed a SATA: boot option in place of the usual UEFI ubuntu one."
- www.thomas-krenn.com/en/wiki/Restore_Ubuntu_UEFI_Boot_Entries_after_BIOS_Update
When updating the BIOS of a Supermicro X9SCM-F motherboard (from BIOS Version 1.x to 2.x), these boot entries will be lost and Ubuntu will no longer boot afterwards. The problem can also occur alongside a BIOS or Grub update.
Sorry for bad links, I haven't got enough reputation to post more than two...