I had dual boot working for the last few months on my PC, with Windows 10 and the EFI partition on a NVMe drive and Ubuntu on a SATA SSD. Both the Windows Boot Loader and Grub are installed on the NVMe drive, while the Grub config is on the SATA SSD.
Unfortunately, the last time I used Windows it did not shut down properly (I had to power cycle the PC) and now grub only displays the grub>
prompt. Selecting the Windows Boot Manager from the motherboard's EFI does boot Windows correctly.
So I booted from a live USB, installed boot-repair and ran the utility. Whether I used the recommended repair or selected Purge GRUB before reinstalling it
and Upgrade GRUB to its most recent version
I had the same result as before.
Though when I unselected SecureBoot
I had another result, grub is now showing error: no such device: b5d41058-ecac-4877-895d-2f9206cef3d2
.
I have been looking into this issue for five hours, so I am now enlisting your help.
I generated a boot info using boot-repair, it should contain everything needed. Note that sdb
is the live USB.
Also noteworthy, I'm using an AMD B550 chipset, which required me to update grub when I first moved my disks to my current PC.
Thank you very much!