Can't boot into Linux after BIOS upgrade

[Smokus]

I am running Dual Boot Windows 11 and EnOS setup.
I just updated my BIOS, and now I can only select Windows 11 in the boot menu. I can’t get into Linux.
Since BIOS settings got reset after the update, I’ve set them up as they were before the update.

Did I just mess everything up or is there a fix?

[dalto]

Should be fixable.

Can you boot off the live ISO and run a couple commands?

sudo efibootmgr -v
sudo parted -l

[Smokus]

I did, and got the following output:

[liveuser@eos-2022.06.23 ~]$ sudo efibootmgr -v
BootCurrent: 0001
Timeout: 1 seconds
BootOrder: 0000,0001,0002
Boot0000* Windows Boot Manager	HD(1,GPT,98e2fb88-b2f0-44e8-ab6a-f76821e6b2fb,0x800,0x32000)/File(\EFI\MICROSOFT\BOOT\BOOTMGFW.EFI)WINDOWS.........x...B.C.D.O.B.J.E.C.T.=.{.9.d.e.a.8.6.2.c.-.5.c.d.d.-.4.e.7.0.-.a.c.c.1.-.f.3.2.b.3.4.4.d.4.7.9.5.}...1................
Boot0001* UEFI: ADATA USB Flash Drive 1100	PciRoot(0x0)/Pci(0x1,0x2)/Pci(0x0,0x0)/USB(7,0)/CDROM(1,0x369fc0,0x33298)..BO
Boot0002* UEFI: ADATA USB Flash Drive 1100, Partition 2	PciRoot(0x0)/Pci(0x1,0x2)/Pci(0x0,0x0)/USB(7,0)/HD(2,MBR,0xab3ab792,0x369fc0,0x33000)..BO

[liveuser@eos-2022.06.23 ~]$ sudo parted -l
Model: WD Elements 25A1 (scsi)
Disk /dev/sda: 4001GB
Sector size (logical/physical): 512B/4096B
Partition Table: gpt
Disk Flags: 

Number  Start   End     Size    File system  Name      Flags
 1      1049kB  4001GB  4001GB  ntfs         Elements  msftdata


Model: ADATA USB Flash Drive (scsi)
Disk /dev/sdb: 7973MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags: 

Number  Start   End     Size   Type     File system  Flags
 2      1833MB  1940MB  107MB  primary  fat16        esp


Model: Force MP600 (nvme)
Disk /dev/nvme0n1: 2000GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags: 

Number  Start   End     Size    File system  Name                          Flags
 1      1049kB  106MB   105MB   fat32        EFI system partition          boot, esp
 2      106MB   123MB   16.8MB               Microsoft reserved partition  msftres
 3      123MB   524GB   524GB   ntfs         Basic data partition          msftdata
 5      524GB   2000GB  1475GB  ext4
 4      2000GB  2000GB  590MB   ntfs                                       hidden, diag

In the live ISO, I could access the filesystem of my EnOS.

[dalto]

It looks like your EFI entry was removed by the BIOS upgrade.

Reinstalling grub should fix it.

Follow the instructions for UEFI installs from here:
https://discovery.endeavouros.com/system-rescue/repair-a-non-booting-grub/2021/03/

You root device is /dev/nvme0n1p5 and your efi partition is /dev/nvme0n1p1

[Smokus]

Damn, that was the solution for sure.
Eventhough sudo fdisk -l showed /dev/sdb and not /dev/nvme0n1 I still went with the root device, and efi partition that you named for me, and it worked.

arch-chroot /mnt worked after that, and output of ls /home was “smokus” so that worked as well.

I then ran these two commands:

grub-mkconfig -o /boot/grub/grub.cfg
grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=EndeavourOS-grub

and after that I could select EnOS in the Boot menu, and was successfully booted into it.

Thanks a bunch!!!

[dalto]

@Smokus

Thanks a bunch!!!

Glad to help!