Hi! I'm running Core 17.3. It works great but I've been getting the "cannot find /boot/efi" error on boot since the beginning. It doesn't seem to impact day to day operations. So it really seems cosmetic to me, though it does annoy me sometimes.
Should I be concerned? Any way to fix? Let me know if I can provide more system info, as well. I know that secure boot is disabled in the BIOS, at least.
I've seen the same thing on my old laptop (which has secureboot turned off). It's ugly and unprofessional looking, but it doesn't seem to affect anything.
This one only means that the firmware for your hardware does not support the kernel's instructions. It can be ignored.
You are fortunate. Most that see this error cannot boot.
The reason why is because it is stating it cannot locate the boot files.
What this tells me in your case is that init is trying to run something related to EFI-GPT, which you are not using. This is safe to ignore, though only because your system boots.
I agree - the error messages flash for a moment while you are booting up - It's not some persistent nagging to drive you crazy.
I would not try to fix these since the system works but, it is an indicator that the age of the machine is showing. It will not be long before you cannot salvage it for use as a daily driver.
I just replaced my core2duo laptop (gave it to a charity who sends them overseas). In it's place is a nice Dell 1st gen i7 laptop I hope to get another few years out of that (i don't use it a lot).