You are not logged in.

#1 2025-10-13 20:56:58

minimal0
Member
Registered: 2025-10-13
Posts: 1

[SOLVED]LVM On LUKS Arch Install - Configuring Boot Loader GRUB

Hi,

I'm attempting to install Arch on my Desktop Computer, with fully encrypted disks.

I'm having issues writing out the proper Kernal Parameters, for GRUB_CMDLINE_LINUX_DEFAULT

Where I add the cryptdevice UUID and root path, as it shows in the LVM on LUKS guide: https://wiki.archlinux.org/title/Dm-cry … t_loader_2

When I attempt to configure the grub, I get the output:

"/etc/default/grub: line 6: loglevel=3 quiet splash cryptdevice=UUID=XXXX-XXXX-XXXX-XXXXX-XXXXXXX:cryptlvm root=/dev/mapper/MVolGroup/root: No such file or directory"

The UUID I am using is for the disk partition that contains root.

Am I using the wrong UUID, am I giving the incorrect pathway to root?

I also have a crypttab setup for separate disks that don't contain root.

Any help would be Appreciated! Let Me know if there is any other information I can provide that would help make the issue more clear.

//////EDIT///////

I was able to configure grub properly by moving my "quiet splash" parameters out of GRUB_CMDLINE_LINUX_DEFAULT and into GRUB_CMDLINE_LINUX instead.
Mainly it was the splash parameter causing the issue, moved quiet for preference.
Though if anyone knows why does this make a difference?

Last edited by minimal0 (2025-10-14 02:51:06)

Offline

#2 2025-10-15 11:49:38

lihanzhang
Member
Registered: 2024-09-02
Posts: 3

Re: [SOLVED]LVM On LUKS Arch Install - Configuring Boot Loader GRUB

Hello
Try to use "cryptdevice/dev/sda2(your now partition path)=:cryptlvm root=/dev/mapper/MVolGroup/root"
If it work, your previous settings is wrong.
Have you changed HOOK? You need add "encrypt lvm2" HOOK in "/etc/mkinitcpio.conf" before the HOOK "filesystem"

This is my encrypted partition informations
[root@XXX]# lsblk
NAME          MAJ:MIN RM  SIZE RO TYPE  MOUNTPOINTS
sda             8:0    0   20G  0 disk 
├─sda1          8:1    0  500M  0 part  /boot
└─sda2          8:2    0 19.5G  0 part 
  └─SYSTEM    254:0    0 19.5G  0 crypt
    ├─OS-SWAP 254:1    0    4G  0 lvm   [SWAP]
    └─OS-ROOT 254:2    0 15.5G  0 lvm   /
sr0            11:0    1 1024M  0 rom

Offline

Board footer

Powered by FluxBB