EFI boot fallback
On tuesday I arrive at my home, talk to my wife and after some while decided to turn the computer on to pay a bill. To my surprise I faced a black screen with a little “A2” at the bottom right corner. After pushing all the cables off and pluging all then again: black screen. After replacing the motherboard battery a little message at POST and: black screen.
So one night passed, yesterday I just arrive and sleep at the couch. Today I decided to do some researching. After unpluging the HDD cable and boot the machine I could get, at least, the BIOS screen, if we can still call it BIOS…
Okay now I known that there is nothing wrong with the hardware some something in software world gone wild. I’ve just reseted the BIOS (or motherboard’s FW) to factory defaults, disabled legacy boot, save, reboot… Okay now I see Windows booting up. Things were already better… but I want my beloved Linux up and running since Windows are for pussies (my wife agreeds, I guess).
To my happines was not too hard to recovery from that disaster.
The EFI stuff holds a EFI folder where you may find some little
program called fallback.efi. To run this you have to reboot
at EFI shell and run this commands:
fs0:
cd EFI\BOOT
fallback.efi
This little 3 commands had saved my day. This little savior
will search for BOOT.CSV file recovering what was damaged.
After that the Fedora’s boot entry appears again at BIOS
(which is not BIOS anymore), and I have just to setup the
right order.
I found this at this page: https://fedoraproject.org/wiki/GRUB_2
Thank you internet for being a so good resource for troubleshooting!!!
Cheers,