Arch Linux

GoluDholu

Member

Registered: 2022-11-05

Posts: 27

[Solved] What to do when GRUB updates?

So my GRUB package updated. From last time's experience, I fear I will end up breaking my system if I reboot without performing grub-install. However, I do not remember what flags I had when installing the OS. Also, I have dual-boot with Windows 11.

I can see the following instructions:

$ grub-install ...
$ grub-mkconfig -o /boot/grub/grub.cfg

From the installation instructions at https://wiki.archlinux.org/title/GRUB, I can see that I have to run some variant of the following command

grub-install --target=x86_64-efi --efi-directory=esp --bootloader-id=GRUB

So the first task is to identify what is my efi-directory, aka esp.

Output of ls /boot

efi   initramfs-linux-lts-fallback.img  intel-ucode.img
grub  initramfs-linux-lts.img           vmlinuz-linux-lts

Output of ls /boot/efi:

Boot   bootmgr   BOOTNXT   EFI  'System Volume Information'

Output of /boot/efi/EFI

Boot  Dell  grub  Microsoft

So it appears my esp is /boot/efi. Is this correct?

Now we need to identify the bootloader-id, which I think is just grub (lowercase) from the directory listing.

Finally, the commands I need to run are:

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

Last edited by GoluDholu (2023-02-06 16:55:35)

Fixxer

Member

From: Poland

Registered: 2011-08-29

Posts: 232

Re: [Solved] What to do when GRUB updates?

Post output of commands:

efibootmgr

grep efi /etc/fstab

cat /etc/default/grub

korokos

Member

From: Turkey

Registered: 2013-01-12

Posts: 9

Website

Re: [Solved] What to do when GRUB updates?

What should UEFI users do after the update? I always run the commands below and no error occuring.

$ sudo grub-install /dev/sda
$ sudo grub-mkconfig -o /boot/grub/grub.cfg

Is this a correct way of action?

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Head_on_a_Stick

Member

From: The Wirral

Registered: 2014-02-20

Posts: 9,003

Website

Re: [Solved] What to do when GRUB updates?

^ The UEFI version of grub-install does not accept a block device as an argument so that would be ingnored and the default for --efi-directory (/boot/efi/?) would be presumed.

Are you sure it is a UEFI system?

[ -e /sys/firmware/efi ] && echo UEFI || echo non-UEFI

---

Jin, Jîyan, Azadî

GoluDholu

Member

Registered: 2022-11-05

Posts: 27

Re: [Solved] What to do when GRUB updates?

Post output of commands:

efibootmgr

grep efi /etc/fstab

cat /etc/default/grub

Output of efibootmgr

BootCurrent: 0001
Timeout: 2 seconds
BootOrder: 0001,0002,0000
Boot0000* UEFI PC711 NVMe SK hynix 512GB FJACN61791020CL24 1    PciRoot(0x0)/Pci(0x6,0x0)/Pci(0x0,0x0)/NVMe(0x1,AC-E4-2E-00-16-9E-5B-91)/HD(1,GPT,cdbe6109-54ba-4b7c-99ee-8ae5ba5820bb,0x800,0xfa000)/File(\EFI\Boot\BootX64.efi){auto_created_boot_option}
Boot0001* grub    HD(1,GPT,cdbe6109-54ba-4b7c-99ee-8ae5ba5820bb,0x800,0xfa000)/File(\EFI\grub\grubx64.efi)
Boot0002* Windows Boot Manager    HD(1,GPT,cdbe6109-54ba-4b7c-99ee-8ae5ba5820bb,0x800,0xfa000)/File(\EFI\Microsoft\Boot\bootmgfw.efi)57494e444f5753000100000088000000780000004200430044004f0042004a004500430054003d007b00390064006500610038003600320063002d0035006300640064002d0034006500370030002d0061006300630031002d006600330032006200330034003400640034003700390035007d0000000e000100000010000000040000007fff0400

grep efi /etc/fstab

UUID=1AE0-F296          /boot/efi     vfat          rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=ascii,shortname=mixed,utf8,errors=remount-ro    0 2

# GRUB boot loader configuration

GRUB_DEFAULT="0"
GRUB_TIMEOUT="5"
GRUB_DISTRIBUTOR="Arch"
GRUB_CMDLINE_LINUX_DEFAULT="loglevel=3 quiet"
GRUB_CMDLINE_LINUX=""

# Preload both GPT and MBR modules so that they are not missed
GRUB_PRELOAD_MODULES="part_gpt part_msdos"

# Uncomment to enable booting from LUKS encrypted devices
#GRUB_ENABLE_CRYPTODISK="y"

# Set to 'countdown' or 'hidden' to change timeout behavior,
# press ESC key to display menu.
GRUB_TIMEOUT_STYLE="menu"

# Uncomment to use basic console
GRUB_TERMINAL_INPUT="console"

# Uncomment to disable graphical terminal
#GRUB_TERMINAL_OUTPUT="console"

# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `videoinfo'
GRUB_GFXMODE="1280X800"

# Uncomment to allow the kernel use the same resolution used by grub
GRUB_GFXPAYLOAD_LINUX="keep"

# Uncomment if you want GRUB to pass to the Linux kernel the old parameter
# format "root=/dev/xxx" instead of "root=/dev/disk/by-uuid/xxx"
#GRUB_DISABLE_LINUX_UUID="true"

# Uncomment to disable generation of recovery mode menu entries
GRUB_DISABLE_RECOVERY="true"

# Uncomment and set to the desired menu colors.  Used by normal and wallpaper
# modes only.  Entries specified as foreground/background.
export GRUB_COLOR_NORMAL="light-gray/black"
export GRUB_COLOR_HIGHLIGHT="black/light-gray"

# Uncomment one of them for the gfx desired, a image background or a gfxtheme
#GRUB_BACKGROUND="/path/to/wallpaper"
#GRUB_THEME="/path/to/gfxtheme"

# Uncomment to get a beep at GRUB start
#GRUB_INIT_TUNE="480 440 1"

# Uncomment to make GRUB remember the last selection. This requires
# setting 'GRUB_DEFAULT=saved' above.
#GRUB_SAVEDEFAULT="true"

# Uncomment to disable submenus in boot menu
#GRUB_DISABLE_SUBMENU="y"

# Probing for other operating systems is disabled for security reasons. Read
# documentation on GRUB_DISABLE_OS_PROBER, if still want to enable this
# functionality install os-prober and uncomment to detect and include other
# operating systems.
GRUB_DISABLE_OS_PROBER="false"

GRUB_FONT="/boot/grub/unicode.pf2"

Head_on_a_Stick

Member

From: The Wirral

Registered: 2014-02-20

Posts: 9,003

Website

Re: [Solved] What to do when GRUB updates?

So the EFI system partition is mounted under /boot/efi/ and the bootloader ID would appear to be "grub".

FWIW I would have used 'lsblk -f' & 'parted --list' to find the ESP mountpoint (parted will show the 'boot, esp' "flags" for the relevant partition).

And please use code tags rather than quote tags when posting terminal output.

---

Jin, Jîyan, Azadî

GoluDholu

Member

Registered: 2022-11-05

Posts: 27

Re: [Solved] What to do when GRUB updates?

It worked flawlessly. Thank you all.