I had the idea to update the bios on my motherboard (B450 MSI gaming). I had Windows 10 and Manjaro working fine. After the update my manjaro boot option disappeared. Windows 10 is the only choice and work fine. It seems that grub was remove.
I look around to see a reliable way to restore it but it is all over the place and not up to date.
I have an brand new UEFI system with the boot drive an M2 with windows and manjaro on it.
I tried one which require to mount the efi partition in /mnt/ (/dev/nvme0n1p2) and "sudo grub-install ..." but this part fail with grub-install error : impossible to obtain the canonical path overlay.
Is there a safe procedure to recover grub without reinstalling the dawn thing again ?