grub-install: error: unknown filesystem.

[DavidHenryThoreau]

I'm getting grub-install: error: unknown filesystem. during installation.

Do you have any idea what I've missed during my installation ? seems other users have same error https://gist.github.com/huntrar/e42aee630bee3295b2c671d098c81268

1 root@archiso ~/# lsblk
NAME            MAJ:MIN RM   SIZE RO TYPE  MOUNTPOINTS
loop0             7:0    0   672M  1 loop  /run/archiso/airootfs
sr0              11:0    1 790.3M  0 rom   /run/archiso/bootmnt
vda             254:0    0   100G  0 disk
├─vda1          254:1    0   511M  0 part  /mnt/boot/efi
└─vda2          254:2    0  99.5G  0 part
  └─vda2_c      253:0    0  99.5G  0 crypt
    ├─arch-root 253:1    0    50G  0 lvm   /mnt
    ├─arch-swap 253:2    0     4G  0 lvm   [SWAP]
    └─arch-home 253:3    0  45.5G  0 lvm   /mnt/home

+ arch-chroot /mnt grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=GRUB --modules=tpm --disable-shim-lock
Installing for x86_64-efi platform.
grub-install: error: unknown filesystem.

cat /mnt/etc/default/grub

# GRUB boot loader configuration

GRUB_DEFAULT=0
GRUB_TIMEOUT=2
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=auto

# 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.
#GRUB_COLOR_NORMAL="light-blue/black"
#GRUB_COLOR_HIGHLIGHT="light-cyan/blue"

# 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_PRELOAD_MODULES="part_gpt part_msdos lvm"
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash cryptdevice=/dev/vda2:vda2_c:allow-discards root=/dev/mapper/arch-root resume=/dev/mapper/arch-swap rw"
GRUB_ENABLE_CRYPTODISK=y
GRUB_DISABLE_LINUX_UUID=true
GRUB_DISABLE_SUBMENU=y

[chadymorra]

hmmm, did you make sure to use --type luks1 when formatting the partition with cryptsetup luksFormat?

[DavidHenryThoreau]

Yes :

cryptsetup --type luks1 luksFormat /dev/vda2

I'm using parted

parted -s /dev/vda mklabel gpt
parted -s /dev/vda mkpart "EFI" fat32 2048s 512MiB
parted -s /dev/vda set 1 esp on
parted -s /dev/vda mkpart "lvm" ext4 512MiB 100%