Actually, this crap happened me many times and I was able to solve after
burning a mobo just to figure out what was happening. PLEASE READ

When the system has not grub installed everything is ok, but after the install 
efi is destroyed. The only way to solve it is to jumper the two pins under the 
ram, it will reset cmos and efi. Then you have to create a freedos bootable usb 
stick with the bios updater on it. Pay attention that 1.x can't be updated to 
2.x, so check twice for the exact bios version.
Then flash the bios.

Now reboot the computer. It will automatically check for any bootx64.efi in 
Boot folder in the efi partition. If you have something there, it will boot it.
In the case you want to reinstall grub you can, but in order to AVOID TO REPEAT 
EVERYTHING just remove the efibootmgr and efivars packages, without them 
grub-install won't touch the efi entries.

If you have any questions please ask, maybe i have some news since I am
still trying to add a standard entry as i used to have.

** Changed in: linux (Ubuntu)
       Status: Expired => Invalid

** Changed in: linux (Ubuntu)
       Status: Invalid => New

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  [Fujitsu Lifebook AH532] UEFI firmware locks itself after installing
  Ubuntu in UEFI mode

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