Hello! I have just had a horrible experience of my Asus motherboard (TUF GAMING X570-PLUS) suddenly not booting...The NVME device (CSSD- M2B05GPG2VN) was no longer availalbe on the list of bootable devices from BIOS menu of the motherboard.
I still don't know exactly what happened but my suspicion is that something triggered the 'reset' of the motherboard (may have been that the cr2032 battery went bad? I replaced it) Here is what I did to solve it: - I downloaded SystemRescue https://www.system-rescue.org/ , created a USB thumbdrive boot device. - After booting from it, I ran efibootmgr -c -d /dev/nvme0n1p1 -p 1 -L "Guix" -l "\EFI\Guix\grubx64.efi" - Finally, I was able to select the NVME boot device. It seemes that onboard ethernet (Probaly RealTek) completely died at the same time... I tried various BIOS recovery procedure such as triggeron ON/OFF of LAN from Bios Settings screen, updating to the latest BIOS, etc, - none of it worked. So I am using a USB3.0 Ethernet Adaptor right now. I hope this memo will be of use to someone in the future! -Yasu
