Fedora 40: booting from root-subvolume fails

[stefangweichinger]

I am only starting to use this tool, so forgive me any FAQ here.
Browsed the code and the issues and so far couldn't find a solution.

I set up grub-btrfs as instructed (I assume) on a laptop with Fedora 40.
Snapshots are in place, the Makefile detects the snapshots and the config is generated.

When I simply want to boot into the plain root-subvolume (= not using a snapshot) it fails to detect the root-fs.
As far as I see the part with "rootflags=subvol=root" is missing in grub.cfg, when I add that booting succeeds.

It seems to look for a subvolume "sysroot" while the subvolume is called "root" here.

When I try to boot a snapshots it fails with some error mentioning tpm. I will retry and add more details soon.

thanks for your work!

EDIT: I follow this and there's a fix for the tpm-issue. Testing.

[stefangweichinger]

I come back here because the issue still persists on 2 of my Fedora 40 systems. I wonder if I can configure (or have to) the part rootflags=subvol=root somewhere in the config of grub-btrfs?

[stefangweichinger]

I missed some steps in the howto .. proceeding, not 100% done yet.
Wondering how to convert existing dirs like "~/.thunderbird" to subvolumes (it's not a fresh installation of Fedora).