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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

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[Solved] UUID for root reverted to previous UUID (lemmy.ml)

submitted 1 year ago* (last edited 1 year ago) by Endrom@lemmy.ml to c/linux@lemmy.ml

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I suddenly got the same problem in /efi/loader/entries all conf files reverted to previous uuid (first post ). To change uuid I just edited all conf files with the correct uuid for root.

I don't know if manually changing was correct or if I should use some sort command.

Bootctl status

UUID in status is wrong.

I have no idea what is reverting UUID back to the wrong one after updating system.

I could just reinstall but if possible I would like to try to fix this and learn.

Edit: Problem was that in /etc/kernel/cmdline had wrong UUID. Changed it to correct one and dracut-rebuild uses correct UUID.

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[–] Endrom@lemmy.ml 1 points 1 year ago (1 children)

I used arch-chroot. I mounted efi to efi dir with mount and used mount -o subvol=@subvolname to sub vol dir. Just incase i will reinstall nvidia drivers when booted normally. I will read about initrd. Thanks for all the info.

[–] krnl386@lemmy.ca 2 points 1 year ago* (last edited 1 year ago) (1 children)

I think the key would be figuring out where this extra UUID is coming from. Maybe next time you try this, make a note of all the UUIDs on your system (including the bootable USB) and see which one ends up in the bootloader config.

Knowing what’s happening can help guide your Googling to find out why it’s happening and how to fix it.

[–] Endrom@lemmy.ml 2 points 1 year ago (1 children)

I used gparted, blkid, checked fstab and by-uuid dir and no partition or drive had that UUID.

[–] krnl386@lemmy.ca 2 points 1 year ago (1 children)

Weird… the only thing I can think of is that maybe the UUID changes on every boot with live USBs, since the root filesystem is ephemeral …

[–] Endrom@lemmy.ml 1 points 1 year ago

I think I found what changes root UUID. When I used dracut-rebuild all entrie UUIDs changed to the wrong one. Now I have to find how to stop that.