bug#44877: Root on LVM support

[Ashish SHUKLA]

El 2026-02-01 22:25, Rutherther escribió:

Hi,

> Bilinmek Istemiyor <benibi...@gmail.com> writes:

> > with my usual setup with root on luks + lvm + btrfs.  For a week, I thought
> > that there was something wrong with my config.scm until being aware of by
> > user ruther in guix channel of libera.chat.
> >
> > Basically in my case  grub can open luks, in grup command prompt, I can see
> > the lvm devices by ls command and but load kernel somehow.
> >
> > I am really frustrated that such a important feature is neglected for
> > years. This is truly a show stopper for me. Please do  something about
> > this.

> just fine.  I have read through the ticket, and must admit I am bit
> confused what does not work.  Could you share what you configuration
> (config.scm) and layout partition layout look like?  Maybe also whether
> you are using BIOS or UEFI?



(define %bootloader
  (bootloader-configuration
   (bootloader grub-efi-bootloader)
   (timeout 7)
   (menu-entries
    (list
     (menu-entry
      (label "NixOS")
      (device (uuid "3320-6183" 'fat))
      (chain-loader "/EFI/systemd/systemd-bootx64.efi"))))
   (targets '("/boot"))
   (keyboard-layout %keyboard-layout)))

> > > I am newbie to guix and have been trying to install it for the first time > > My stack is LUKS -> LVM -> BTRFS (seems the same as you) and I can boot > > Thanks

I believe that the reason that it works for one of you but not the other
is this line

   (targets '("/boot"))

If you has your efi partition on /boot/efi, then, grub would embed the
lvm module automatically to the efi. Presumably because it would detect
you have lvm (haven't verified that, maybe it does it always)

But when you specify /boot, it doesn't have to embed any modules,
because they're on the same partition. So it hands off to the grub.cfg
that does NOT load the lvm.

So for some LVM on root on Guix will work, while for some it won't.
Depending on their config.

Rutherther

After replacing /boot with /boot/efi in filesystem mount-points, and the 
grub-efi-bootloader configuration's targets property, it works just fine now.

Thank you!
--
Ashish SHUKLA | GPG: F682 CDCC 39DC 0FEA E116  20B6 C746 CFA9 E74F A4B0
             | GPG: 01DE 145E 35D8 C87E 956E  FEC9 D4C4 4BDA 2C98 C654

"If I destroy you, what business is it of yours ?" (Dark Forest, Liu Cixin)

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